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. Compression/cargo straps provide exceptional load control and 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. External zippered pocket for keys/wallet etc. Single daisy chain tie down strip for additional load attachment. Ultra-stiff polypropylene backing plate. Ultra-visible three way 3M triangle logos