UltrAspire Purist Hydration Pack

The Purist is engineered for multisport athletes who demand maximum versatility and reliability from their gear.

With a 22-litre capacity and a roll-top design, this pack carries everything you need for endurance adventures across any terrain. Massive side pockets offer fast access to essentials and can carry any UltrAspire hydration components. A quick-stash outer pocket with load compression keeps gear secure and manageable. The Purist is also reservoir-compatible for seamless hydration on the move.

Equipped with removable anodized aluminum buckles, it provides durable attachment points for trekking poles, ice axes, or hose management. The harness system webbing and sliding toggle ensure a secure, adjustable fit. The front harness features large zippered bottle pockets for weather protection, layered zippered pockets within easy reach, sweat-proof phone storage, and dual zippered top shoulder pockets for added organization and access. The MaxO2 Waist feature allows for a completely customizable fit, whether the pack is empty or fully loaded.

The Purist is part of UltrAspire's Pure Mountain Running line, created for athletes who move through environments where gear is continuously tested by terrain. The primary body is constructed using Challenge Cloth, a three-layer composite combining high-density polyester, UHMWPE fiber reinforcement and a polyurethane film. This creates an exceptionally lightweight fabric with abrasion resistance claimed to exceed even military-spec fabrics, built to withstand sharp rock, brush and the constant friction of long days in the mountains.

Complementing this is EnduraMesh XT, a true four-way stretch mesh that moves naturally with the body while maintaining structural integrity under load. Unlike conventional stretch materials that can fatigue and lose shape over time, EnduraMesh XT combines high-strength Nylon 66 with 30% UHMWPE fibers, a material rated up to 15 times stronger than steel by weight. This provides adaptable storage that expands when needed, secures gear without sagging and withstands repeated use in harsh environments.

One size fits most.