The Bluff Technical Pack is constructed with a blend of nylon and polyester fabrics for a lightweight, durable, and water-resistant outer shell; a built-in water resistant rain fly goes a step further to keep your gear dry on the trail. The padded waist strap, which includes two zippered hip pockets, contoured shoulder straps, and mesh back panel, which keeps the Bluff from sitting directly on your back, make this one of the most comfortable packs around. The overall 40 liters of storage are peppered with built-in zippered pockets and sleeves for organizing gear without intruding on the overall capacity of the pack. A multitude of compression straps, bottle holders, and shock cords make securing gear to the outside of the pack a cinch. As a safety measure, we’ve added an emergency whistle quick-release buckle in blaze orange color to the sternum strap.