Skip to product information
1 left
Product Description
Cracks RK30
■Excerpt from the manufacturer's description
A lightweight, fully waterproof alpine backpack that has continued to evolve since CRUX was founded
RK Series [ロールトップタイプ]
The roll-top design 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.
Another major appeal is its lightweight design, made possible by its simple structure.
"Two Sources of Peace of Mind"
・Fully waterproof
Because it is completely waterproof, it provides peace of mind when facing water during activities such as hiking in the rain, canyoning, and alpine climbing. The roll-top section is made of a flexible material that enhances the airtight seal, ensuring complete waterproofing.
・High durability
Made from a durable material that incorporates Kevlar, it offers peace of mind knowing it’s unlikely to tear on rocky terrain, walls, gullies, or key routes and sections of ice.
・Water resistance
We have applied a water-resistant coating with a pressure rating of 10,000 mm to the Kevlar lining. Furthermore, the seams of the fabric are welded to prevent water from seeping in.
・Durability
The main fabric of the jacket—Kevlar—is a material that can withstand strong impacts or pressure from obstacles along the route, such as rocks, ice, and branches, as well as from gear like ice axes and ski edges.
・Simplicity
By designing the structure to be simple, we’ve minimized the risk of damage and other issues, whether you’re on a trail, a multi-day hike, or a long-term trip.
・Repair
We keep spare parts on hand for many components, so we can replace them as needed. We also strive to perform repairs at the factory where the product was manufactured whenever possible, and have established a system designed to ensure that each backpack can be enjoyed for many years.
■Features
・The buckles (female) in high-use areas are made of aluminum to reduce the risk of damage (top lid, waist belt).
・Pocket for small items
・Axe Holder
・Side Compression
・Made of thick mesh fabric for excellent sweat and water drainage
・Removable webbing waist belt
・Loading loop
・Upper compression strap
■ Capacity: 30L
■ Weight: 975 g
■Size: One Size
■Material: 40% Kevlar, 60% Nylon
■Frame: None
*Please note that since we are using images provided by the manufacturer, the actual product may differ slightly in terms of specifications (such as logo placement, color, and pattern placement).
■Excerpt from the manufacturer's description
A lightweight, fully waterproof alpine backpack that has continued to evolve since CRUX was founded
RK Series [ロールトップタイプ]
The roll-top design 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.
Another major appeal is its lightweight design, made possible by its simple structure.
"Two Sources of Peace of Mind"
・Fully waterproof
Because it is completely waterproof, it provides peace of mind when facing water during activities such as hiking in the rain, canyoning, and alpine climbing. The roll-top section is made of a flexible material that enhances the airtight seal, ensuring complete waterproofing.
・High durability
Made from a durable material that incorporates Kevlar, it offers peace of mind knowing it’s unlikely to tear on rocky terrain, walls, gullies, or key routes and sections of ice.
・Water resistance
We have applied a water-resistant coating with a pressure rating of 10,000 mm to the Kevlar lining. Furthermore, the seams of the fabric are welded to prevent water from seeping in.
・Durability
The main fabric of the jacket—Kevlar—is a material that can withstand strong impacts or pressure from obstacles along the route, such as rocks, ice, and branches, as well as from gear like ice axes and ski edges.
・Simplicity
By designing the structure to be simple, we’ve minimized the risk of damage and other issues, whether you’re on a trail, a multi-day hike, or a long-term trip.
・Repair
We keep spare parts on hand for many components, so we can replace them as needed. We also strive to perform repairs at the factory where the product was manufactured whenever possible, and have established a system designed to ensure that each backpack can be enjoyed for many years.
■Features
・The buckles (female) in high-use areas are made of aluminum to reduce the risk of damage (top lid, waist belt).
・Pocket for small items
・Axe Holder
・Side Compression
・Made of thick mesh fabric for excellent sweat and water drainage
・Removable webbing waist belt
・Loading loop
・Upper compression strap
■ Capacity: 30L
■ Weight: 975 g
■Size: One Size
■Material: 40% Kevlar, 60% Nylon
■Frame: None
*Please note that since we are using images provided by the manufacturer, the actual product may differ slightly in terms of specifications (such as logo placement, color, and pattern placement).
Available Payment Methods
Credit Card Payment
Convenience Store Payment
Digital Wallets and QR Code Payments
Bank Transfer
Japan Post Bank
Cancellations, Returns, and Exchanges
Before Placing Your Order
As a general rule, we do not accept returns or exchanges of merchandise for reasons related to the customer’s preferences, such as “it didn’t look like I expected” or “the size doesn’t fit.” If you have any questions or concerns, please consult with our staff first.
Please place your order after understanding and agreeing to the following points.
・Depending on the device or environment you are using, the color and texture of the product may appear slightly different.
・There may be slight variations in the dimensions listed in the product description.
・Minor scratches or scuffs may occur unavoidably during the manufacturing process.
・Depending on the material of the product, there may be variations in color, texture, or pattern from item to item.
Order Cancellation
As a general rule, we do not accept cancellations after a shipping confirmation email has been sent.
We make every effort to manage our inventory, but if we are unable to secure the items you ordered for unavoidable reasons, we may have to cancel your order.
Purchase Limit
We may impose purchase limits on certain products. Orders placed from multiple accounts believed to belong to the same person, or orders suspected of using bots, may be canceled or the quantity reduced.
*Please note that we assume no liability for any losses, damages, or other adverse consequences resulting from a cancellation.
Returns and Exchanges
While we take the utmost care to ensure the quality of our products and their packaging, in the unlikely event that an item arrives damaged or soiled, or if you receive an item that differs from your order, please contact us via the “Contact Form ” within 7 days of the delivery date. We will cover all associated costs.
・If a replacement item is available, we will replace the item.
・If we are unable to secure a replacement, we will issue a refund.
Please note that we cannot accept returns or exchanges if any of the following conditions apply. We appreciate your understanding.
・If more than 8 days have passed since the product was delivered
・When we determine that the customer has finished using the product
・If the item has been altered, washed, or dry-cleaned
・If any accessories (product tags, warranty cards, bags, boxes, etc.) are lost or damaged
・If odors, scratches, or stains occur while the item is in the customer's possession
・Items that come into direct contact with the skin, such as underwear, socks, and accessories, as well as perfumes and cosmetics, etc.
・If the item is returned without prior notice
About the Listed Prices
We take every precaution to ensure that the product information displayed on this site is accurate. However, in the unlikely event that we discover after payment has been processed that a product’s price was incorrectly displayed on the site, we will contact you and either adjust the price to the correct amount and process the payment, or cancel your order.
Important Notes
*Please note that inventory for this item is shared across our physical stores and other shopping sites operated by our company. We check inventory after receiving your order, so the item may be out of stock in some cases. We apologize for any inconvenience this may cause and will notify you via email if this occurs. Thank you for your understanding.