Description
The Altruist Hydration Pack is part of our Pure Mountain Running line, designed for athletes who move with purpose through environments that constantly test both gear and resolve. Built for long efforts where reliability matters most, the primary body utilizes challenge cloth — a three-layer composite combining high-density polyester, UHMPE fiber reinforcement, and a protective polyurethane film. The result is a fabric that delivers exceptional abrasion resistance while remaining remarkably lightweight, ready to withstand sharp rock, dense brush, and the relentless friction of miles in the mountains.
Supporting this foundation is our EnduraMesh XT, a true 4-way stretch mesh engineered to move naturally with the body. Where conventional stretch materials fatigue and fail, EnduraMesh XT integrates Nylon 66 for structural strength with 30% UHMPE fibers, a material rated up to 15 times stronger than steel. This creates adaptive storage that maintains its integrity over time, ensuring secure carry and consistent performance through demanding conditions.
Every fabric choice in the Altruist reflects a commitment to durability, movement, and trust — because when the terrain pushes back, your gear should remain the one constant you can rely on.
Recommended Use:
The Altruist is designed for multisport athletes and endurance adventurers who need a versatile, high-capacity pack built to handle everything. Ideal for ultrarunning, adventure racing, mountaineering, and long backcountry adventures where carrying a variety of gear is essential. Perfect for athletes who demand fast access, durable construction, and all-day comfort across unpredictable terrain and changing conditions.
Details:
• 28-liter roll-top design built for multisport and endurance athletes
• Durable construction with premium materials for rugged, all-condition use
• Massive side pockets fit all UltrAspire hydration options and allow fast gear access
• Externally accessible, insulated reservoir sleeve for efficient mid-effort refills
• Large quick-stash outer pocket with compression for secure load management
• Anodized aluminum buckles provide reliable attachment for poles, ice axe, or hose management
• MaxO2 sternum system with adjustable toggle buckle for custom fit and breathability
• Front harness includes a zippered bottle pocket with weather protection
• Layered zippered pocket at the fingertips for quick-access items
• Sweat-proof lined phone pocket keeps electronics protected
• Dual zippered top shoulder pockets for additional organization
Fit: Fitted
Size(s): SM/MD, MD/LG
Color: White/Black
Hydration (included): Not Included
Bottle Compatible (not included): UltraFlask 550 Hybrid Bottle, Softflask 300, 500, 625, 800, 1L, Human 20 Bottle, Reservoir
Capacity: 1708 c.i. (28L)
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