Exterior: 600D ripstop polyester, waterproof coating, sealed seamsLining: cotton polyester (50% polyester / 50% cotton), 190T nylon (chest and bottom)Filling: 50g polyfillHardware: chrome-plated zincWaterproof: 3000 mm, breathable: 3000 g/m² for 24 hours and windproofNo back seamTwo adjustable front straps with quick-release clips and VelcroShoulder gussets / adjustable cross surcingleElastic leg straps, adjustable and removable / rounded tail flap