This bag securely retains a large bottle, snacks, or other accessories, while still providing the option of being rolled for extreme weather protection. It can be fitted to either side of the stem/handlebars, or to one of the larger packs. Features Roll top or open top while securely retaining contents. Duraflex™ Tough 600D TPU / PU coated main fabric. Gear straps included Specifications Size - 9cm x 10cm x 20cm* Capacity - 1L (1.5L when open) Weight - 85g *when at maximum rolled capacity