Hydration bladder ,cold-resistant anti-freeze, excessive environmental protection, meets U.S.A FDA standard Name : Hydration Bladder Colour: army green (blue, gray black,white etc also available)Capacity:2 L (1L,1.5L,2.5L,3L also availale)Material:Ruggednon-toxic food-grade TPU (EVA also available)Size: 48*17 cmWeight:200g (+/-20g allowed)Film thickness:0.3mm (can be customized from 0.3mm to 0. ...