Aerodynamic bag with roll closure. Sonically welded and seam sealed for durable, waterproof protection. Positive locking QuickClick fixer or strap fixer make mounting a snap. 420 and 840 Denier Nylon fabric Rigid EVA foam insulation Tail light strap Small: 15x9x9cm, 0.6L, 140g Medium: 18.5x11x11.5cm, 1L, 170g Large: 23x11x13cm, 1.5L, 235g TT9819B