Black Diamond Mercury 55 Backpack, Coal, Medium Polyester twill, nylon twill Imported Our full-featured backpacking pack with ergoACTIV XP suspension maximizes comfort and stability with room for full amenities each night in camp ErgoACTIV XP suspension with Open-air back panel and Swing Arm shoulder straps Top-loading with floating top pocket, plus front zippered access and Waterproof taping on top and bottom Compartment divider, side and hip belt pockets, front and internal organizer pockets Retractable trekking pole/ice axe loop, sleeping pad straps, hydration compatible, Also available as women's-specific Onyx