Fit & Design: Constructed of 840d ballistic nylon, this is a go-anywhere, totally waterproof day pack Features strong nylon fabric coated with polyurethane and RF-welded for excellent abrasion resistance and weather-proofing Easy to carry with padded shoulder straps and easy to open with a classic, flip-top lid TRU(R) Zip waterproof zippers Floating computer sleeve protects laptops up to 15" Internal and external compression straps secure contents