Last Updated on July 27, 2026 by Daniel Globe
Choosing the right hiking backpack starts with the trips you actually plan to take. A short summer day hike may need only water, food, extra clothing, navigation gear, and emergency essentials, while an overnight or multi-day trip must also carry a sleep system, shelter, cooking gear, and more food. Fit matters just as much as volume: even a high-quality pack can become uncomfortable if its torso length, hip belt, or shoulder harness does not match your body.
Quick Answer
Choose a hiking backpack by matching its capacity to your actual gear, then size it to your torso and hips. Test it with realistic weight, check that the hip belt carries the load comfortably, and compare support, ventilation, weather protection, durability, pack weight, and features before buying.
Key Takeaways
- Choose capacity from the gear you need to carry, not from trip length alone.
- Measure from your C7 vertebra to your iliac crest and use the backpack manufacturer’s size chart.
- A properly positioned hip belt should transfer much of the load to your hips without painful pressure or slipping.
- Test the backpack with realistic weight before deciding whether the suspension and shoulder harness fit you.
- Balance durability, support, weather protection, features, and empty pack weight rather than choosing solely by liters or price.
At a Glance
| Time Required | About 30–60 minutes to measure, compare, load, adjust, and test a pack properly |
| Difficulty | Easy to moderate |
| Tools Needed | Flexible measuring tape, your typical hiking gear or equivalent test weight, and the manufacturer’s sizing chart |
| Cost | Measuring and fitting are free; backpack prices vary widely by size, materials, suspension, and features |
Start With Your Hiking Needs
The best backpack depends on where you hike, how long you stay out, the weather, and the bulk of your equipment. Start by laying out the gear you expect to carry instead of buying a pack first and trying to fill it later.
A short warm-weather hike may require a compact daypack. Cold-weather hiking, photography, family outings, climbing, or remote routes can require more space even when you are only outside for one day. Overnight trips add a sleeping bag or quilt, shelter, food, cooking equipment, and other camping gear.
Your pack also needs room for appropriate emergency supplies. The National Park Service describes the Ten Essentials as basic first-aid and emergency equipment that hikers should adapt to their activity and conditions.
Note: Backpack capacity is only a starting point. Two hikers taking the same three-day trip may need very different pack sizes because sleeping bags, tents, food, winter layers, camera equipment, and other gear vary greatly in bulk.
How to Choose a Hiking Backpack Step by Step
- List everything you need to carry. Include water, food, clothing, emergency equipment, shelter, sleep system, and trip-specific gear.
- Choose a practical capacity range. Use trip length as a guide, then adjust for your actual equipment and season.
- Measure your torso and hips. Compare those measurements with the manufacturer’s sizing information.
- Choose the support level. Heavier or bulkier loads usually benefit from a more structured suspension and supportive hip belt.
- Load and adjust the pack. Test it with approximately the weight and volume you expect to carry.
- Walk before you buy. Check for pressure points, slipping, restricted movement, excessive bouncing, and difficult-to-reach adjustments.
Finding the Right Fit
Fit is one of the most important parts of choosing a hiking backpack. Backpack size is normally based on torso length rather than your overall height or clothing size. Different brands and models use different sizing ranges, so take your measurement first and then consult the specific manufacturer’s chart.
Measure Your Torso Length Correctly
For a more accurate measurement, locate the C7 vertebra—the prominent bone near the base of your neck when you tilt your head forward. Next, find the top of your hip bones, called the iliac crest. Measure along your back from the C7 vertebra down to the level of the iliac crest.
This C7-to-iliac-crest method is used in current Osprey sizing guidance and the Gregory pack-fit guide.
Check the Hip Belt and Shoulder Harness
The hip belt should wrap securely around the upper part of your hips rather than hanging at your waist or slipping below the hip bones. It should feel snug without creating painful pressure points.
The shoulder straps should follow the shape of your shoulders without a large gap between your body and the harness. They should stabilize the pack without forcing all of its weight onto your shoulders.
Adjust the Load Lifters and Sternum Strap
Many larger hiking and backpacking packs include load-lifter straps between the upper pack body and shoulder harness. Tightening them helps bring the load closer to your body and improves stability when the suspension is fitted correctly. Osprey’s current fitting instructions describe approximately a 30- to 60-degree load-lifter angle as a normal fitting range for its packs.
The sternum strap should keep the shoulder straps comfortably positioned without squeezing your chest or restricting breathing.
Pro Tip: Do not reject or approve a backpack while it is empty. Put realistic weight inside, loosen the straps, fit the hip belt first, adjust the shoulder straps and load lifters, and walk around long enough to notice pressure points or movement.
Test the Backpack Under Load
Load the backpack with a weight similar to what you expect to carry and walk around for several minutes. Manufacturer fitting instructions from both Osprey and Deuter recommend fitting packs with a realistic load rather than judging an empty pack.
While walking, climb stairs or step onto a low platform if possible. Bend slightly, turn your torso, and move your arms. The pack should stay stable without sharp pressure on your hips, shoulders, lower back, or neck.
Considering Capacity and Features
Backpack capacity is measured in liters, but there is no single correct size for every trip. Current backpacking guidance commonly places weekend and multi-day packs in broad ranges because modern equipment varies greatly in bulk.
| Typical Trip | Common Capacity Range | Best For |
|---|---|---|
| Short day hike | About 10–20 L | Water, food, light layers, and compact essentials |
| Full-day hike | About 20–35 L | Most day hiking, extra clothing, food, and emergency gear |
| 1–3 nights | About 30–50 L | Compact or lightweight overnight equipment |
| 3–5 nights | About 50–80 L | Multi-day backpacking and bulkier loads |
| 5+ nights or bulky winter gear | Often 70 L or more | Extended trips, cold-weather equipment, or unusually bulky gear |
These are starting points rather than strict rules. Before buying, place your actual equipment together and estimate whether it will fit comfortably without forcing gear into the pack or leaving a large pack mostly empty.
Choose Features You Will Actually Use
Useful backpack features can include:
- Hydration-reservoir compatibility
- Side pockets that hold water bottles securely
- Hip-belt pockets for snacks, a phone, or navigation tools
- Compression straps to stabilize changing loads
- Trekking-pole or ice-tool attachments
- A separate sleeping-bag compartment
- Front or side access to the main compartment
- Ventilated back panels for warm conditions
- An integrated or removable rain cover
- Adjustable torso-length suspension
More features are not automatically better. Every pocket, zipper, frame component, and accessory adds weight or complexity. Choose features that solve a real problem for the type of hiking you do.
Evaluating Comfort and Support
| Fit Check | What You Want | Warning Sign |
|---|---|---|
| Hip belt | Secure contact around the upper hips | Sliding down, pinching, or painful pressure |
| Shoulder harness | Smooth contact around the shoulders | Large gaps, rubbing, numbness, or excessive pressure |
| Back panel | Stable contact or designed ventilation space | Uncontrolled swaying or hard pressure points |
| Load lifters | Pack drawn closer to the upper body | Pack pulling backward or straps becoming ineffective |
| Movement | Stable carry while walking and turning | Bouncing, shifting, or restricted arm movement |
Comfort depends on more than thick padding. Padding that feels plush in a store can still become uncomfortable if the torso size or load transfer is wrong. A supportive suspension should keep the pack stable while allowing the hip belt and harness to work together.
For heavier loads or longer hikes, a structured internal frame can improve load control. Frameless designs can reduce empty pack weight, but they generally depend more heavily on careful packing and are best suited to hikers whose equipment is already light and compact.
Warning: Persistent numbness, sharp pain, major pressure points, or severe rubbing during a fitting are signs that something is wrong. Readjust the pack or try another size or model rather than assuming you will simply “break it in.”
Exploring Material and Durability
Backpack bodies are commonly made from nylon, polyester, or related synthetic fabrics. Denier ratings such as 70D, 210D, or 420D describe the weight of the yarn used in a fabric; a larger denier number does not by itself guarantee that one complete backpack will be more durable than another.
Fabric weave, reinforcement, coatings, seam construction, stitching, and the quality of zippers and buckles all affect long-term performance. Inspect high-stress areas such as shoulder-strap anchors, hip-belt attachments, compression straps, and the bottom panel.
Water Resistance and Rain Protection
Do not assume that a hiking backpack is waterproof simply because its fabric has a water-resistant coating. Zippers, seams, openings, and hydration ports can still admit water.
For wet environments, look for a pack with appropriate rain protection or add a properly sized rain cover. For example, Deuter’s current rain-cover construction uses a waterproof PU-coated fabric with taped and welded seams, while Gregory similarly describes seam-taped waterproof rain covers.
For items that absolutely must remain dry—such as electronics, insulation, medications, or important documents—separate waterproof bags or dry sacks provide another layer of protection inside the backpack.
Assessing Weight and Size
Empty pack weight matters because every ounce becomes part of the load you carry. However, choosing the lightest backpack available is not always the best approach. A very light pack that lacks the support needed for your normal load may feel less comfortable than a slightly heavier pack with a well-fitted frame, hip belt, and harness.
Compare the pack’s empty weight with its suspension design and the manufacturer’s recommended or maximum carry weight when that specification is available. Do not assume that two backpacks with the same capacity are designed to carry the same load.
Size matters as well. A pack that is much larger than necessary can encourage overpacking and may allow a small load to shift. A pack that is too small can force you to strap equipment awkwardly to the outside or compress gear excessively.
The best backpack is not the biggest or lightest one—it is the smallest pack that comfortably carries your required gear while fitting your body and load.
Match the Backpack to Terrain and Weather
Terrain and climate can change which features matter most. On steep or rugged trails, load stability and a secure hip belt become especially important. Scrambling may favor a narrower pack that stays close to your body and does not interfere with arm movement.
In hot climates, a ventilated back panel can improve comfort. In rain-prone areas, prioritize reliable rain protection and waterproof storage for critical gear. Winter hiking often requires more pack volume because insulated clothing, gloves, traction devices, and emergency equipment take up additional space.
For technical routes, skiing, climbing, or mountaineering, also check whether the pack has the attachment points and shape needed for the equipment you carry.
Pack the Weight for Better Stability
A good backpack can still feel unstable if it is packed poorly. Keep dense, heavy equipment reasonably close to your back instead of placing it far from your body’s center of gravity. Use compression straps to prevent partially filled packs from shifting.
Frequently used items such as water, snacks, navigation tools, sunscreen, rain protection, and a first-aid kit should remain reasonably accessible. Avoid hanging several heavy objects loosely from the outside, where they can swing and throw off your balance.
Budgeting for Quality
Price should be considered alongside fit, construction, comfort, and how often you expect to use the backpack. An occasional day hiker may not need the same suspension or materials as someone carrying multi-day loads several times each year.
Instead of choosing the cheapest or most expensive model automatically, compare:
- Torso and hip-belt sizing options
- Suspension and recommended load range
- Fabric and reinforcement
- Zipper and buckle quality
- Included rain protection
- Adjustment range
- Warranty and repair support
- Empty pack weight
- Features you will genuinely use
Sales and previous-season models can provide good value when the backpack still fits correctly and has the features you need. Fit should remain the deciding factor rather than the discount.
Seeking Recommendations and Reviews
Reviews are useful when they explain how a backpack performs under conditions similar to your own. Look beyond the overall rating and pay attention to the reviewer’s torso size, typical load, trip length, climate, and hiking style.
A backpack praised by an ultralight weekend hiker may not suit someone carrying bulky winter gear. Likewise, a heavy-duty expedition pack may be unnecessary for short summer day hikes.
Use professional reviews and owner feedback to identify common strengths or problems, but verify technical details—such as sizing, capacity, recommended load, materials, and included accessories—against the manufacturer’s current product information.
Common Backpack-Buying Mistakes
- Buying by height alone: torso length is the more useful measurement for pack sizing.
- Trying on an empty pack: the suspension behaves differently once weight is added.
- Choosing maximum capacity “just in case”: unnecessary space can add weight and encourage overpacking.
- Assuming every pack is waterproof: check the construction and use appropriate rain protection.
- Ignoring the hip belt: a poor hip-belt fit can undermine an otherwise good backpack.
- Buying for features rather than fit: extra pockets cannot compensate for an uncomfortable suspension.
- Ignoring the pack’s intended load: similar-capacity backpacks can have very different suspension systems.
Pro Tip: Bring your normal hiking gear when shopping in person, or recreate its weight and bulk. A 15-minute loaded test often tells you more about a backpack than an hour of comparing feature lists online.
If you are planning a hiking trip in Tanzania, climate and season may also affect how much rain protection, clothing capacity, and water-carrying space you need. See Best Time to Travel to Tanzania: A Complete Guide when planning those destination-specific conditions.
Frequently Asked Questions
What factors should I consider when choosing a hiking backpack?
Start with the gear you need to carry, then compare capacity, torso and hip-belt fit, suspension, empty pack weight, recommended load, weather protection, ventilation, materials, pockets, access, and price. Fit and load support should normally take priority over extra features.
What are the different types of hiking backpacks?
Common categories include small daypacks, larger day-hiking packs, overnight packs, multi-day backpacking packs, and extended-trip packs. Packs may also use internal frames or lighter frameless construction, and specialized versions are available for climbing, trail running, skiing, and other activities.
How do I determine the correct size of a hiking backpack?
Measure your torso from the C7 vertebra at the base of your neck to the level of your iliac crest at the top of your hip bones. Measure your hip circumference as required by the manufacturer, then compare both measurements with the specific pack’s sizing chart. Do not rely on height or clothing size alone.
What are some important features to look for in a hiking backpack?
Useful features can include an adjustable torso, supportive hip belt, load lifters, sternum strap, compression straps, hydration compatibility, accessible bottle pockets, hip-belt pockets, ventilation, rain protection, trekking-pole attachments, and multiple access points. Choose features based on how you hike rather than trying to get every available option.
How do I ensure that a hiking backpack is comfortable to wear?
Test the pack with realistic weight. Position and tighten the hip belt first, then adjust the shoulder straps, load lifters, and sternum strap. Walk around and check for slipping, bouncing, gaps, numbness, rubbing, or painful pressure. Try another size or model if those problems cannot be adjusted out.
How many liters should a hiking backpack be?
For many hikers, roughly 20–35 liters works well for a full-day hike, while compact 1–3-night trips may fit in about 30–50 liters. Three- to five-night trips commonly use 50–80 liters, and extended or winter trips may require 70 liters or more. Your actual gear volume should make the final decision.
Does a hiking backpack need to be waterproof?
Not necessarily, but you need an effective plan for keeping important equipment dry. Many hiking packs use water-resistant materials rather than fully waterproof construction. A rain cover plus waterproof inner bags or dry sacks for sensitive gear can provide practical protection in wet conditions.
Sources
- Osprey — Backpack Size Chart & Fitting Guide — torso sizing, realistic test loads, hip-belt position, shoulder harness, and load-lifter adjustment.
- Gregory — Pack Fit & Sizing Guide — C7-to-iliac-crest torso measurement and pack-fitting guidance.
- Deuter — How to Adjust a Backpack — weighted fitting, hip-belt positioning, shoulder-strap adjustment, and back-length considerations.
- U.S. National Park Service — Hiking Safety and the Ten Essentials — emergency equipment hikers should account for when planning pack capacity.
- Deuter — Raincover II — waterproof rain-cover construction, PU coating, taped seams, and denier material information.