Fabric is your choice. Ultra 200 is the lightest—full UHMWPE construction with exceptional strength for its weight. Ultra 400 TX is heavier but nearly twice the abrasion resistance, the right call for hard use and rough terrain. Challenge Ultra Grid is a recycled nylon reinforced with a UHMWPE grid—the eco-conscious option, with good but lower overall performance than the pure Ultra fabrics. Learn more about fabrics →
Each pack is custom-built to your specific torso length for superior fit and load transfer. Volume can be custom ordered to match your needs. If you want to fit a bear canister horizontally, the circumference should be 41 inches.
Aluminum stays bend and hold their shape to align with your torso. Sewn to the base of the pack and connected to the hipbelt triglides for direct load transfer.
Built with Challenge Sailcloth Ultra fabrics — engineered for durability, not just low weight. Choose your material for the main body and high-wear areas independently. The pocket, base, and water bottle holders take the most abuse from granite and rough terrain, so fabric choice there matters.
Both included. Roll-top closure cinches down tight or opens for maximum capacity. The lid has a zippered pocket underneath and doubles as a cinch system for top-carrying a bear canister. Use both or just the roll-top—your call
Front stash pocket with cinch closure and drain holes—no mesh like other brands. Built to take abuse from cross-country scrambling through rugged terrain while keeping essentials accessible
1/2" genuine Evazote foam shoulder straps contour along your shoulders and chest with a pivoting design that eliminates pressure points on your clavicle and neck. 1" adjustable sternum strap for optimal load stability
1/2" Evazote foam padding. Can be configured with ice clip slots, tool loops, and hipbelt pockets to match your needs
Versatile attachment system for carrying trekking poles, ice axes, snowshoes, and other gear. Multiple lash points provide secure attachment options for whatever your route demands
Four-point compression with Fastex buckles stabilizes loads and reduces pack volume when not fully loaded
Each pack is custom built to fit your body. You'll need two measurements:
Torso Length:
Waist/Hipbelt:
Include these measurements when you order. Questions? Contact me.
We'll review your build and send you a payment link • 6-8 week lead time
Questions? Contact us