Lewis N. Clark Urban Gear Backpack, Grey, One Size Rugged 16 oz, 100 percentage cotton canvas construction with water-resistant coating Soft, peached polyester twill liner Large main compartment features zippered top compartment - great for rain jacket, towel, umbrella, etc. Zippered, padded back compartment for most laptops/tablets up to 15 inches Padded adjustable straps for easy transport