Main ï 100% Polyester canvas. Bottom Panel ï 200D Waterproof Tarpaulin. Trim Detail ï Genuine Leather. Lining ï 210D Nylon Oxford. Durable, water resistant bottom panel. Oversized main compartment with molded tooth zip closure. Compression strap at sides and snap down top feature quickly reduce bag volume. Custom aluminum hardware. Zip secure stash pocket on front panel. Padded internal computer sleeve ï fits 13ï laptop. Convenient padded interior tablet storage sleeve. Internal organization sleeves 210D nylon oxford lining.