Cold jack backpacks and duffel may be lightweight but that does not make them any less durable. Cold jack products are rugged and tough, leak-proof, and equipped with a rubber-sealed zippers. Everything we sell comes with a limited lifetime warranty and feature heavy duty construction with high-frequency welding. Water-resistant back Pack.…High-frequency seamless welding.…Heavy duty fabrication.…Super lightweight.…Holds 15” laptop in padded neoprene sleeve (included)which connects inside for stability and protection.…Top grab handle.…Comfortable padded straps.…Cushioned mesh back.…Water-tight zippers.…Extra compartments for additional items.…Quick clean material.