RK20

【Store Manager Comments】

The British brand [CRUX]. Its defining features are, above all, "fully waterproof" and "highly durable!" Hearing that alone gives you a sense of complete security. While you might worry about the weight when hearing those two things, it is actually extremely lightweight. It lacks any convenient external pockets, but that’s precisely what makes it appealing, as you can customize and attach your own. It is the best backpack for activities involving heavy gear and wet conditions, such as canyoning, backcountry skiing, and packrafting! This RK20 uses a roll-top design, and while it is 20L, it effectively has a capacity of around 30L. It is a recommended size for day-trip canyoning, hiking, and more.

According to the representative from the importer, STATICBLOOM, there has never been a repair they couldn't handle, so the fact that it can be used for a long time is also a huge plus.

【Manufacturer Quote】

A lightweight, fully waterproof alpine backpack that has continued to evolve since the founding of CRUX

This model was created with features tailored for use in Japan and was released there first.

Packed with features not found in packs over 30L, it is completely waterproof, allowing it to withstand not only weather conditions like snow and rain, but also the rigors of climbing, canyoning, mountaineering, ice climbing, yachting, and kayaking.

RK Series [Roll-top Type]

The roll-top style without a top lid allows for quick access to the main compartment, and the large opening makes it easy to see inside and retrieve what you need. Furthermore, the simplicity of the structure is a major draw for its lightweight design.

※ Although not shown in the product photos, the specifications have been changed to include an ice axe attachment.

【Two Reasons for Peace of Mind】

Welding technology is used to achieve full waterproofing.

The fabric seams are heat-bonded rather than sewn to prevent water from entering. Additionally, the lining is coated with a 10,000mm water-resistance rating, providing waterproofing comparable to rain gear.

Being completely waterproof provides peace of mind against water during rainy mountain trips, canyoning, and alpine climbing. The roll-top section uses a flexible material that increases airtightness, ensuring full waterproofing. It also helps lighten your gear load since you won't need separate dry bags.

High durability is ensured by using Kevlar, the same material used in bulletproof vests. Because it is a durable material, you have the security of knowing it won't easily break on rocky terrain, walls, canyons, or ice routes.

【Features】

 - Aluminum buckles (female) are used for high-frequency connection points to reduce the risk of breakage

- Includes a small accessory pocket inside the main compartment

- Ice axe holder

- Side compression straps

- Thick mesh material for improved sweat and water drainage

- Removable waist belt

- Haul loop

- Top compression strap

【Specifications】

- Capacity: 20 L (Effectively seems to hold around 30L)

- Weight: 895 g

- Size: One Size

- Material: 40% Kevlar, 60% Nylon

- Frame: None

- Country of Origin: China

【Manufacturer Description】

A British brand founded in 2002, focusing on climbing, alpine climbing, and mountaineering.

It started with just four types of backpacks and one tent.

Today, the category has expanded to include sleeping bags and bivouacs. The lineup is carefully curated, with development focused strictly on gear that can truly be used in the mountains.

The product range is developed based on practical climbing experience. Through extensive climbing ranging from the Himalayas to Patagonia and across Europe, from alpine to sports, they reflect necessary specifications in their products and continue to develop gear for climbers.