Speedo Large Teamster Backpack, 35-Liter 91% Polyester/9% Nylon Imported Classic iconic shape and styling with new and improved quality and features Built in laptop sleeve with water resistant bottom to protect PC when pack dropped or sitting on the ground Durable exterior shell; built tough with abrasion resistance for demanding athletes Removable trademarked dirt bag keeps wet/dirty contents separate from electronics or dry/clean items Handy removable bleacher seat for cold, hard, or wet surfaces