BACKPACK DIMENSIONS: The SEG42 measures 12.5 x 22.5 x 11.5 inches (31.75 x 57 x 29 cm) with a volume of 42 Liters. Weighs 2lbs 4oz (1030 g). Carry-on compliant (most airlines). DURABLE EXTERIOR MATERIALS: 840 Denier nylon outer high wear panels, PU waterproofing. 420 Denier nylon outer low wear panels, UTS waterproofing. RELIABLE INNER MATERIAL: Backpack interior is designed with 100 Denier Robic Dynatec weave interior liners and dividers, and UTS waterproofing. SEGMENTED FOR ORGANIZATION: Design includes full access clamshell and external zipper access to all pockets including a padded laptop pocket. Zip away panel stows segments for gear hauling. FLEXIBLE FEATURES: Offers rugged carrying handles on top, bottom and side; stowable shoulder straps; and hypalon tie down points and touch points. Anodized aluminum hardware is load bearing. Patent pending.