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