Last Updated on September 10, 2026 by Daniel Globe
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Weighing a large fish is easier when your sling supports the catch, drains water quickly, and does not take up much room in your tackle setup. The THKFISH Folding Weigh Sling Fish Bag combines a waterproof EVA and PU construction, a stated 110 lb load capacity, a printed 39-inch ruler, and a foldable design that packs down to about 14.5 inches. It is a practical choice for tournament weigh-ins and field use, but the listing has a size-label inconsistency that you should know about before buying. This review breaks down the verified specs, everyday use, care, limitations, and who will get the most value from it.
Quick Verdict
Rating: 8/10, Recommended with caveats
Best For: Anglers who need a foldable weigh sling for bass, carp, catfish, walleye, and tournament-style weighing.
Bottom Line: The 110 lb stated capacity, waterproof surface, drainage-focused construction, and built-in 39-inch ruler make this a useful all-in-one fish-weighing accessory. The main tradeoff is that Amazon’s title uses a 47 x 10.5-inch size label while the detailed product information lists 46 x 10.5 x 21.5 inches, so check the current listing if exact dimensions matter to you.
Key Specifications
| Specification | Detail |
|---|---|
| Brand | THKFISH |
| Model | THKFISH Fish Weigh Bags002 |
| Product type | Folding fish weigh sling / tournament transport bag |
| Detailed dimensions | 46 x 10.5 x 21.5 inches |
| Listing title size | 47 x 10.5 inches |
| Folded transport size | About 14.5 inches (37 cm) |
| Maximum stated capacity | 50 kg / 110 lb |
| Main material | Waterproof EVA material with PU layer |
| Interior | Bumped, non-slip inner design |
| Measuring feature | 39-inch fish ruler printed on the bag |
| Color | Black |
| Size option | One Size |
| Best use | Tournament weigh-ins, field weighing, and short catch handling |
Before You Buy: The Amazon title describes this as a 47 x 10.5-inch bag, while the detailed product information lists 46 x 10.5 x 21.5 inches. If you are buying for a specific fish length, storage compartment, or tournament rule, verify the current dimensions on the listing before ordering.
What Is the THKFISH Folding Weigh Sling Fish Bag?
The THKFISH Fish Weigh Bags002 is a foldable sling designed to support a fish while you weigh it and to help you move the catch during short handling steps. Its boat-shaped construction and widened bottom are intended to create a more stable cradle than a narrow strap-style sling.
The bag combines a waterproof EVA surface with a PU layer, drainage sections at the ends, sturdy handles, and a non-slip interior texture. A 39-inch ruler is printed on the surface, so you can check length without reaching for a separate measuring board when the fish falls within that range. THKFISH states a maximum load capacity of 50 kg, or 110 lb.
Who Should Buy It?
Best For
- Anglers who want one sling for weighing and measuring catches up to the printed 39-inch ruler range.
- Tournament or club anglers who value quick drainage before reading a scale.
- Boat, bank, or travel anglers who need a large sling that folds to about 14.5 inches for storage.
Skip If
- You need a rigid measuring board or a ruler longer than 39 inches.
- You need a dedicated long-term live-fish holding system rather than a weigh sling.
- You require a clearly stated multi-year warranty before buying.
Products Worth Considering
FISH BAG WITH FISH SIZE WEIGHER: Tournament fishing bag with 39 inch fishing size printed on the surface to make it easier to measure the fish caught. The fish weigh in bag is a great addition to any fishing tournament anglers kit and is a nice help even when fishing in the field.
EVA WATERPROOF MATERIAL: This fishing weigh bags is made of high quality EVA waterproof material and PU layer, the surface of the bag won't seep water and is easy to clean, it can be drained quickly when weighing, the inner layer of the bag is made of bumps and non-slip design, this makes it perfect for holding fish and weighing them accurately in competitions
VERSATILE DESIGN – KastKing BlowBak Tactical Fishing backpacks are a light-weight, versatile, sling bag designed for the adventurous angler who likes to hike, canoe, kayak, or SUP to more remote fishing locations. The BlowBak offers the essential features you will need to store and carry your fishing rod/ fishing reel, tools, lures, and tackle for a few hours of fishing without weighing you down. (Dimensions – 8” x 6” x 14”)
Material and Design Features
Waterproof EVA and PU Construction
The main surface uses EVA waterproof material with a PU layer. That matters because a weigh sling gets wet repeatedly, and a surface that resists water seepage is easier to wipe down after a session. THKFISH also uses drainage-oriented sections at the ends so excess water can leave the sling before you settle on a weight reading.
The interior uses a bumped, non-slip texture. This does not remove the need to support the fish carefully, but it can reduce unnecessary sliding inside the bag while you position the catch for weighing.
Boat-Shaped Base and Handles
The sling uses a boat-shaped form with a widened bottom rather than a flat open sheet. That shape gives the fish a defined cradle and helps distribute the load across the bag. Sturdy handles provide the lifting points, while the stated 110 lb maximum capacity gives you substantial headroom for many bass, carp, catfish, and walleye catches.
Built-In 39-Inch Ruler
A printed 39-inch ruler adds a useful second function. For catches within that range, you can measure length and weigh the fish with the same piece of gear. The limitation is straightforward: fish longer than the printed scale still require a separate measuring tool.
Size, Load Capacity, and Portability
THKFISH lists the detailed dimensions as 46 x 10.5 x 21.5 inches, although the product title uses a 47 x 10.5-inch shorthand. The full dimensions are more useful when you are deciding if the sling is large enough for your typical catch or if it will fit in a boat locker.
The bag folds to roughly 37 cm, or 14.5 inches, for transport. That is one of its stronger practical features because the sling offers a large working footprint without forcing you to carry a rigid measuring or weighing platform of similar length.
The maximum stated load is 50 kg, or 110 lb. Treat that as the manufacturer’s capacity limit, not a target weight. You should still lift smoothly, use both handles, and avoid sharp jerks that place extra stress on the bag or the fish.
Pro Tip: Let the end sections drain excess water before you read your hanging scale. That helps reduce the chance that trapped water adds unnecessary weight to the measurement.
How It Performs in Real Use
For Tournament Weigh-Ins
The sling’s strongest use case is a quick weigh-and-measure routine. You can place the fish in the wide cradle, allow excess water to drain, lift from the handles, and use the printed ruler when the fish is 39 inches or shorter. The built-in ruler also means one less separate tool to reach for during a busy weigh-in.
For Larger Catches
The 110 lb stated capacity makes the bag suitable for handling many larger freshwater catches, including carp and catfish. Capacity alone does not guarantee that every large fish will fit comfortably, so the bag’s actual dimensions and the fish’s body shape still matter.
For Boat, Bank, and Field Use
The waterproof surface and foldable format suit wet environments where gear is regularly packed, rinsed, and moved. On a boat, the compact folded size can help save locker space. From the bank, it is easier to carry than a rigid measuring platform with a similar working length.
For Travel and Storage
Once folded, the sling shrinks to about 14.5 inches, making it easier to fit with other tackle. After use, clean and dry it before folding it away. Storing a damp fish bag can create odor and make routine maintenance harder.
How to Use It Correctly
- Open the sling fully: Spread the widened bottom so the fish has a stable cradle rather than resting on a folded section.
- Position the fish carefully: Keep the body supported inside the sling and avoid placing unnecessary pressure on fins.
- Drain excess water: Give the end sections time to drain before attaching or reading your scale.
- Lift with both handles: Raise the sling smoothly instead of pulling from one side or jerking it upward.
- Use the printed ruler within its range: The built-in scale reaches 39 inches. Use a separate measuring tool for longer fish.
- Rinse and dry after use: Wipe or rinse the bag, then let it dry completely before folding and storing it.
Materials, Care, and Safety
The listing identifies EVA waterproof material with a PU layer and includes a California Proposition 65 warning related to DEHP. If chemical exposure is a concern for you, review the current warning and product labeling on the Amazon page before purchase.
This is best treated as a weighing and short-handling sling, not as a long-term live-fish holding container. Keep handling time reasonable, follow local fishing and tournament rules, and return fish promptly when release is required. For saltwater use, the listing does not provide a specific saltwater durability certification, so rinsing the bag with fresh water after exposure is a sensible care step.
Pros and Cons
Pros
- High 50 kg / 110 lb stated load capacity.
- Waterproof EVA surface with PU layer for easier cleanup.
- Drainage-focused end sections help release excess water before weighing.
- Printed 39-inch ruler combines weighing and basic measuring in one tool.
- Folds to about 14.5 inches for easier transport and storage.
Cons
- The listing title and detailed product dimensions do not match exactly.
- The printed ruler stops at 39 inches, so longer catches need another measuring tool.
- Amazon does not state a one-year warranty period on the product page.
Is It Worth the Price?
The THKFISH sling is best viewed as a mid-range, utility-focused fishing accessory when its current price is close to other heavy-duty tournament weigh bags. Its value comes from combining several jobs in one item: supporting the fish, draining water, handling a stated 110 lb load, measuring up to 39 inches, and folding down for storage.
You get the most value if you regularly weigh fish and would otherwise carry a separate sling and measuring tool. It is less compelling if you only weigh small catches occasionally, need a rigid measuring board, or require a longer built-in measuring range.
Products Worth Considering
Waterproof Oxford cloth, fast drainage: This fishing tournament weigh in fish bag is made of waterproof Oxford cloth, the surface of the bag will not seep water and is easy to clean. It can be rinsed with a soap/water spray bottle and inverted to dry, saving time. The net pockets on both sides can quickly drain water when weighing, and the fish will not fall out.
This weighing fishes bag is ideal for quickly and safely weighing large , carp, catfish, and more.
FLY FISHING SLING PACK - Durable 100% recycled CORDURA re/cor construction keeps your gear safe and organized while remaining lightweight for long days on the water.
How It Compares to Alternatives
LEOFISHING’s Tournament Weigh-in Fish Bag is worth comparing if you want another folding sling with handles and a ruler. Buffalo Gear also sells tournament-style fish weigh-in bags that may appeal if you prefer a different bag format or size.
The THKFISH model makes the most sense when your priorities are the stated 110 lb capacity, a 39-inch printed ruler, waterproof EVA and PU construction, and a compact folded size. Compare current dimensions and product details before choosing because weigh bags vary in shape and measuring range.
Products Worth Considering
Heavy Duty Fish Bag: The KastKing EliteTote weigh in bag boasts a TPU mesh-reinforced design that evenly distributes stress to prevent deformation and tearing. Its durable double-layer construction resists punctures while staying flexible. Compared to PVC mesh bags, TPU offers better low-temperature flexibility, UV resistance, and long-term durability.
Compact Folding Design: Easily folds for convenient storage and portability, making it perfect for tackle boxes and on-the-go fishing trips
【HEAVY-DUTY WATERPROOF CONSTRUCTION】Made from durable three-layer composite material, this fish weigh-in bag is waterproof and leak-proof. Its heavy-duty construction is designed for demanding fishing tournament conditions and repeated use.
Frequently Asked Questions
What are the actual dimensions of the THKFISH weigh sling?
Amazon’s detailed product information lists 46 x 10.5 x 21.5 inches. The product title uses 47 x 10.5 inches, so check the current listing if exact fit or storage dimensions are critical for you.
How much weight can the bag hold?
THKFISH states a maximum load capacity of 50 kg, or 110 lb. You should still lift smoothly with both handles and make sure the fish fits the bag comfortably.
How long is the printed fish ruler?
The ruler printed on the sling reaches 39 inches. If your target species regularly exceeds that length, carry a separate measuring board or tape.
Is the THKFISH weigh bag waterproof?
Yes. Amazon lists the water-resistance level as waterproof and describes the main surface as EVA waterproof material with a PU layer. The end sections are designed to let excess water drain during weighing.
Can you use it in saltwater?
The listing describes waterproof materials but does not state a specific saltwater certification. If you use it around saltwater, rinse it with fresh water afterward and dry it completely before storage.
Can the sling be used to transport live fish?
It is designed as a weigh sling and short-handling transport bag, not a long-term live-fish holding system. Use it for brief weighing and handling steps, and follow local rules for fish care and release.
What warranty does THKFISH provide for this model?
The Amazon page provides a link for product warranty information but does not state a one-year warranty period in the visible product details. Check the current warranty information on the listing before purchase if coverage is important to you.
The Bottom Line
The THKFISH Folding Weigh Sling Fish Bag is a strong fit for anglers who want a foldable, waterproof sling with a high stated load limit and a built-in 39-inch ruler. Skip it if you need a rigid measuring system, a ruler beyond 39 inches, or precisely matching published dimensions without any listing discrepancy. Its best features are the 110 lb capacity, drainage-friendly construction, and compact storage, while the size-label inconsistency is the main caveat.
