600D, TPU laminated heavy duty waterproof fabric. Welded construction for permanently sealed seams.Non-wicking TPU roll top closure with innovative interlocking profile that is secure and waterproof.Durable UV resistant PVC free fabric withstands cold temperatures. High performance abrasion resistant fabric.Oval base to resist rolling. Features a replaceable buckle with stainless steel pins. Lash loops for secure attachment.Oval Base x Height/Weight: 8-LITER - (8"x 5") x 17", 9.7 oz / 275g. 13-LITER - 9"x ...