Made from heavy duty UV-treated TPU material.Watertight roll closure with quick release buckles.All seams are electronically heat welded.Fits most crash bars, luggage racks, seats and more Universal mounting using hook &_ loop straps and/or adjustable quick release buckles.Integrated MOLLE system (Removable back pad reveals MOLLE straps).Main compartment measures_ 6.25â (16 cm) L x 4â (10 cm) W x 12â (30 cm) H.Capacity_ 5 Liters.Please note that the bottles shown in the picture are not included.TPU.