Oceanweave 600D reclaimed fishnet polyester with waterproof polyurethane coating Hydracore liner provides an exceptional IPX5 waterproof rating Rixen & Kaul Vario 2 spring-loaded hooks immediately adjust from 6mm - 16mm, without any need for tools Independent main compartment and outer compartment compression/cargo straps provide exceptional load control. Outer straps allow gear to be carried outside of the main cavity - Ideal for unplanned loads faced by commuters Intuitive waterproof roll down closure system Removeable 14.2�x10.2� padded laptop/electronics sleeve/organizer Removeable 10�x8� padded tablet/electronics sleeve/organizer External zippered pocket for keys/wallet, etc Dual daisy-chain tie-down strips for additional load attachment Ultra-stiff Polypropylene backing plate Waterproof outer pocket Hook and Rail 18.5x11.3x5.3� (plus pocket) 1379 c.i. (Single) Black XXX-Large (700+ c.i.)