The price of the backpack is not among the lowest, so I had high expectations for it, but I must admit that the product has even exceeded them – it’s immediately clear that it was designed with great care in terms of user comfort, ergonomics, and build quality. Thanks to the back-opening panel, you can very conveniently pack and unpack items even from the bottom, without having to move everything around. Inside, there’s a functional organizer, and the drawstring closure, adjustable flap, and various straps allow you to use more capacity than the declared 40 liters. The spacious side pockets, numerous attachment points, and the MOLLE/PALS system are big advantages, allowing you to easily adapt the backpack to your own needs. The whole thing is made of solid materials, the stitching, fasteners, and zippers all look very durable – you can confidently load heavy gear and use the backpack intensively outdoors. The carrying system is very comfortable and helps to distribute the weight properly. The SilverFox II works perfectly as an intermediate model between a light daypack and a large expedition pack. It’s neither lightweight nor minimalist, but it was designed with something entirely different in mind – it’s a very solid, spacious, and versatile backpack, where the high price is matched by excellent quality and functionality. I definitely recommend this model.
Wisport SilverFox II Backpack 40 l - Black
Medium-sized military backpack in black with a 40 litre capacity. Designed with numerous practical features—including ski-compatible straps and an advanced SAS carrying system with an OpenBack panel that lets you open the back of the pack. Made from highly durable 500D Cordura and fitted with certified ITW Nexus and Duraflex buckles as well as reinforced seams, this backpack offers outstanding resistance to harsh conditions and mechanical damage.
OpenBack system
The backpack’s construction includes the OpenBack system, making it easy to access the inside using a detachable back panel. By unfastening the shoulder straps and the zip, you can quickly reach the entire main compartment of the backpack from the frame side—especially useful when carrying a lot of gear, as it allows you to take out or pack away specific items without removing the rest of your equipment.
Advanced SAS carrying system
SAS (Semi Adjustable System) is a highly advanced suspension system that lets you precisely adjust the pack to your body shape. The adjustable sternum and hip belts effectively transfer the weight onto your hips, easing the load on your spine. The shoulder straps can be detached via buckles, and there’s a dedicated spot for a hydration tube. Soft, breathable mesh on the straps and back panel improves air circulation.
Lid and extended collar design
The main storage area is based on a spacious compartment with a lid and collar closure. The lid is secured by two adjustable straps with Fastex buckles, while the collar with its drawstring lets you expand the pack’s storage capacity when needed. There’s also a top zippered pocket in the lid and a velcro panel for attaching patches or emblems.
MOLLE/PALS mounting system and ski holders
Exterior and interior MOLLE/PALS webbing lets you attach compatible pouches and gear. External straps with buckle closures are great for carrying larger items—like a sleeping bag, pad, or jacket. Open side pockets are ideal for carrying a water bottle or thermos, and they include ski holders.
Rain cover and internal organizer
Inside you’ll find an organiser with a mesh pocket and a special compartment for a hydration system water tank. A rain cover is hidden in the double bottom, offering protection for the backpack and its contents during rain or snow.
Main features
- 40 litre capacity
- Made from durable 500D Cordura
- Certified Duraflex and ITW Nexus buckles
- Collar with drawstring to increase backpack capacity
- MOLLE/PALS mounting system
- External mounting straps with buckle closures
- Side pockets with ski holders
- Comfortable SAS carrying system
- OpenBack system providing access to the main compartment from the back
- Adjustable hip and sternum belts
- Rain cover stored in a double bottom
- Internal organizer and water reservoir compartment
MILITARY is the exclusive distributor of Wisport.
Wisport is a Polish brand with more than 30 years of tradition in designing and manufacturing top-quality backpacks and outdoor gear. Valued both by survival and tourism enthusiasts, as well as by soldiers, rescuers, and uniformed service officers. The company's products are characterized by solid workmanship, a modern design approach, and the use of proven technologies. Wisport backpacks are created in cooperation with experts, which results in functional solutions such as FAS+ carrying systems, damage-resistant Cordura® materials, and waterproof protective coatings. The range includes tactical, trekking, and urban models that meet the diverse requirements of users.
| Color/camouflage | Black |
|---|---|
| Main compartments fastening | Flap + drawstring cord |
| Dedicated laptop pocket | No |
| Molle/pals compatible | Yes |
| Mesh spacer | Yes |
| Number of compartments | 1 |
| Dimensions | 600 x 280 x 240 mm |
| Number of pockets | 3 |
| Main color | Black |
| External equipment attachment option | Yes |
| Capacity | 40 l |
| Compatible with hydration system | Yes |
| Raincover | Yes |
| Waist strap | Yes |
| Chest strap | Yes |
| Weight | 2050 g |
| EAN | 5902431604633 |
| Brand | Wisport |
| Main material | 500D Cordura |
| EAN |
The velcro panel is an area with sewn-on Velcro tape that allows easy attachment of various additional items, such as patches or pockets.
Cordura is a material woven from durable nylon fibers, developed by DuPont. The structure of the material provides lightness and abrasion resistance, as well as weather resistance. Due to its properties, Cordura is widely used in tactical equipment.
SAS Ergonomic Military (Semi Adjustable System) is a semi-adjustable carrying system that provides a proper fit for the user and increases the comfort of the backpack by relieving pressure on the spine and shoulders. The system consists of, among other things, profiled adjustable shoulder straps with a quick-release system, an adjustable chest strap, a partially adjustable waist belt and an ergonomic frame design. All the components are made of materials with high durability and resistance to harsh use.
The OpenBack system is a solution that allows access to the backpack's interior through an integrated, zippered perimeter located around the back panel. This allows efficient and easy access to the contents carried deep inside the backpack, without having to open the flap.
MOLLE (Modular Lightweight Load-carrying Equipment) is a system for attachment of tactical equipment, used for example in backpacks or tactical vests. It provides the possibility of flexible and modular placement of various accessories and pockets, which allows personalization and optimal adjustment of the item to the specific needs of the user. It is widely used by the military, special services and survival and outdoor enthusiasts.
High-quality buckles and fasteners distinguished by their durability and reliability. Made of durable materials such as nylon or polyamide, used in products that require a solid and secure fastener, providing security and comfort.
Duraflex is a type of high-quality buckles, fasteners, snaps and accessories made from durable materials such as polyamide, acetal, as well as metals and metal alloys. They are resistant to weather conditions, UV radiation and mechanical damage. Duraflex products are used for fastening, connecting and adjustment in backpacks, bags, clothing and military equipment.
Reviews with photos
Review summary
Number of reviews: 32
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The backpack is spacious and well-designed, with a small organizer inside. You can attach additional gear to it using the MOLLE/PALS system or other available straps. The only drawback is the back stiffener—the rail was cut so that sharp edges were created, which over time may wear through the bottom of the tunnel where it is located. I suggest protecting the lower end of the rail by covering it with thick heat-shrink tubing.
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The backpack is very spacious, the color matches the one in the photo, and the carrying system is well designed – even with a heavy load and long periods of carrying, it doesn't cause problems. Definitely worth recommending.
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Amazing backpack – sturdy, comfortable, and very spacious. During a winter trip to the Tatra mountains, it was comfortable even when fully loaded. The side pockets can fit an Esbit thermos even with a full backpack. The access system from the back is not very convenient – the idea itself is okay, but to reach the inside, you need to unfasten five buckles and a zipper, which is a bit troublesome.
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I hesitated for a long time before buying a medium-sized backpack, but the Silverfox II turned out to be a real hit. Well made and high-quality materials. Fits the back very well. Option to attach pockets—including to the hip belt, which was important to me. The backpack opens from the back, so when you want to access the inside, you don't lay it on its dirty side and you don't get dirty again when putting it back on. Thanks to the extension, adjustable flap, and straps on the flap, underneath, and on the sides, you can fit much more than the declared capacity allows. I would give 6 stars if that was possible.
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The backpack is solidly made, which is to be expected from the Wisport brand. It has practical solutions, such as a back opening that makes it easier to access the inside without making a mess. Inside, there's an organizer and the option to attach a hydration bladder. On the outside, there are plenty of places to attach additional gear. I have already used the backpack several times during outdoor trips – it is very spacious and comfortable to use. I definitely recommend it.
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The backpack is very well made, spacious, and comfortable to use. I've been using it every day for several months and it works great.
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It gives the impression of solid construction. Excellently designed – it has an extra pocket on top, can be opened like a suitcase, and the roll-top closure allows you to expand the backpack. There are many options for attaching gear, an internal organizer with Velcro, a sturdy hip belt, and side pockets for bottles.
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Excellent, compact backpack for mountain trips. Durability thanks to cordura and military design make it a solid piece of equipment. Lots of MOLLE straps allow you to attach many additional pockets.
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The backpack is characterized by high-quality workmanship, which is typical for the Wisport brand. It gives the impression of being extremely durable. A big plus is the ability to fully unzip the backpack, which allows easy access to everything inside. I replaced my Sparrow II 30l with extra pockets with this one, and now all my gear fits without a problem. An excellent choice for BOBA, also in terms of color.
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This is the best backpack you can buy. It's very spacious and durable—practically indestructible. The backpack even surpasses Chuck Norris in terms of durability. In addition, the manufacturer offers a great warranty, which makes this a lifetime purchase. I'm very impressed by the quality of these backpacks and the attention to detail. If this one ever breaks, I will definitely buy the same one again. Highly recommend!
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Great backpack – very comfortable to carry and exceptionally spacious. A very practical advantage is the possibility to access the inside by opening the back part of the backpack. Highly recommended.
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Very sturdy backpack with a wide range of possible uses.
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Practical backpack made of sturdy material, ideal for short trips.
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Durable backpack to which you can buy specially matched pockets and pouches. The warranty is also at a high level.
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