{"id":629170,"date":"2026-02-23T23:56:09","date_gmt":"2026-02-23T22:56:09","guid":{"rendered":"https:\/\/de-stage.ultraspire.com\/?post_type=product&p=629170"},"modified":"2026-02-28T16:30:04","modified_gmt":"2026-02-28T15:30:04","slug":"altruist-hydration-pack","status":"publish","type":"product","link":"https:\/\/de-stage.ultraspire.com\/en\/produkte\/altruist-hydration-pack\/","title":{"rendered":"Altruist Hydration Pack"},"content":{"rendered":"

\"\"<\/a><\/p>\n

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 \u2014 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.<\/p>\n

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.<\/p>\n

Every fabric choice in the Altruist reflects a commitment to durability, movement, and trust \u2014 because when the terrain pushes back, your gear should remain the one constant you can rely on.<\/p>\n


\nRecommended Use:
\n<\/strong>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.
\nDetails:<\/strong>
\n\u2022 28-liter roll-top design built for multisport and endurance athletes
\u2022 Durable construction with premium materials for rugged, all-condition use
\u2022 Massive side pockets fit all UltrAspire hydration options and allow fast gear access
\u2022 Externally accessible, insulated reservoir sleeve for efficient mid-effort refills
\u2022 Large quick-stash outer pocket with compression for secure load management
\u2022 Anodized aluminum buckles provide reliable attachment for poles, ice axe, or hose management
\u2022 MaxO2 sternum system with adjustable toggle buckle for custom fit and breathability
\u2022 Front harness includes a zippered bottle pocket with weather protection
\u2022 Layered zippered pocket at the fingertips for quick-access items
\u2022 Sweat-proof lined phone pocket keeps electronics protected
\u2022 Dual zippered top shoulder pockets for additional organization<\/p>\n

Fit:<\/strong>\u00a0 Fitted<\/p>\n

Size(s):<\/strong> SM\/MD MD\/LG<\/p>\n

Color: <\/strong>White\/Black<\/p>\n

Hydration (included):<\/strong> \u00a0Not Included<\/p>\n

Bottle\u00a0Compatible (not included):<\/strong>\u00a0 UltraFlask 550 Hybrid Bottle, Softflask 300, 500, 800, Human 20 Bottle, Reservoir<\/p>\n

Capacity:<\/strong> 28 liter<\/p>\n

<\/div>\n","protected":false},"excerpt":{"rendered":"

The Altruist Hydration Pack is engineered for multisport athletes and mountain runners who require greater capacity, stability, and all-day comfort when carrying heavier loads. With a 28-liter capacity and roll-top closure, the Altruist is built for extended efforts where preparation, reliability, and efficient organization are essential. Massive side pockets provide quick access to essentials and are compatible with UltrAspire hydration components, while a quick-stash outer pocket with integrated load compression keeps gear secure and manageable on the move. The pack is reservoir-compatible for seamless hydration across long distances and varied terrain. Designed for stability under load, the Altruist features a supportive waist belt that helps leverage weight distribution when the pack is at capacity, creating a more comfortable ride over long miles. Removable anodized aluminum buckles offer durable attachment points for trekking poles, ice axes, or sleeping pads, ensuring adaptability across disciplines and conditions. The harness system includes adjustable webbing with a sliding toggle for a secure, dialed fit. Up front, large zippered bottle pockets provide weather protection, while layered zippered storage keeps nutrition and essentials within easy reach. Sweat-resistant phone storage and dual zippered top shoulder pockets add organization without interrupting movement.<\/p>\n

Constructed with our EnduraMesh XT, the Altruist features a true 4-way stretch mesh that moves naturally with the body while maintaining structural integrity under load. Unlike conventional stretch materials that fatigue and lose shape over time, EnduraMesh XT blends high-strength Nylon 66 with 30% UHMPE fibers \u2014 a material rated up to 15 times stronger than steel by weight. This advanced composition delivers adaptive storage that expands when needed, secures gear without sagging, and withstands abrasion from repeated use in harsh environments, preserving both durability and a streamlined fit.<\/p>\n

Built for athletes who carry more so they can go farther, the Altruist delivers dependable performance, balanced load management, and the confidence to stay self-sufficient in demanding environments. Available in SM\/MD & MD\/LG.<\/p>\n

 <\/p>\n

 <\/p>\n

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