Versatile and mobile., the Lightning 45 pack by Exped is made for fast light adventures. It's an extremely lightweight top loader with roll top closure. The unique T Rex suspension system minimizes contact points and the pack body can be fully compressed, enhancing load control. The suspension system shines with simple and quick adjustability and superb mobility of hips and torso. Made for fast and light alpine, expedition, trekking and backpacking adventures Slim design puts center of gravity close to the body for superior load control Top loading with roll up closure to adjust pack volume Full pack body compression system. Straps are long enough to hold large items like mats or tent rainflys Single frame stay anchor point allows torso and hip movement in all directions Can be closed both drybag style or as vertical compression Excellent back venting due to limited contact points Elaborately shaped dual density foam hipbelt is supportive and molds itself around the hips Adjustable back length between 42 and 57 cm. Unique T rex suspension system Compressible pack body Water repellant Hydration system compatible: exit through the outer zipper of the internal pocket Removable top compression strap with aluminum Rapide Hook can be used to compress the pack or to secure gear like rope or raingear when not in use 2 ice tool and trekking pole loops 4 base loops can be used to attach sleeping mats, tent, etc. Load limit: 53 lb. 2 Spandex stretch fabric pockets on the hipbelt for quick access to small personal items 2 large Spandex stretch pockets on the sides of the pack body for water bottles or long items like tent poles, shovel shafts, or snow anchors Number of pockets: 4 Material: 210 D Dyneema Ripstop Nylon, PU coated, 1500 mm water column Size: 28.3 12.6 9.8 in Weight: 37 oz. Capacity: 2746 cu in.