What Our Gearhead(R) Experts Are Saying:"When you're climbing high and moving fast, the Trilogy Sky 25+ hits that sweet spot of fit, function, and weight. The Boa(R) adjustment system is a game-changer-it's the most secure and dialed-in carry I've ever had on technical terrain."Designed for bold ascents and fast, technical lines, the Millet Trilogy Sky 25+ Backpack is built to move with us across demanding alpine environments. Whether we're scaling steep ridges, skinning to a couloir, or pushing a summit in variable weather, this pack keeps gear secure and instantly accessible with side zip entry, intuitive pocketing, and a modular setup. Crafted from incredibly durable Dyneema(R) fabrics, this alpine pack is abrasion resistant and water repellent, shedding snow and sharp rock with ease. A Boa(R) LI2 adjustment system delivers a custom-fit harness that stays tight and stable on exposed traverses and vertical scrambles. Dedicated attachments keep our ice tools, rope, and skis in place, while internal hydration compatibility keeps us fueled. Lightweight, technical, and versatile, the Trilogy Sky 25+ is made for mountain athletes who demand total reliability on mission days.