Features: All Round Insulation Solutparticlemail: Highlighting a warm tube cover, this moisturization bladder maintains ideal water temperature in cold weather, prevents overheating, and hurdles damage from direct sunlight, ensuring refreshing beverages constantly. Exclusive Grade Substancemail: Constructed of permanent +TPE, this complimentary bladder preserves water cleanness and stays flexible in extreme climates, while the advanced double seal technology assurances impermeable execution. Stable Stream & Decreased Sloshing: Internal confuse plan minimizes water motion during running otherwise cycling, ensuring smooth stream without sticking to the inner partitions for uninterrupted moisturization. Easy Cleaning & Wide Opening: The large top opening with a sliding seal allows effortless ice/water refills, while the smooth inner face simplifies cleaning for hassle complimentary maintenance. Flexible Agreement: Perfect for hikers, joggers, and skiers, this bladder accommodates most moisturization vests and backpacks, ideal for camping, biking, and wilderness expeditions in 1.5L/2L/3L measurements. Specifications: Substancemail: +tpe Product sizemail: 1.5L (360x180mm); 2L (390x180mm); 3L (425x200mm) ( detail as shown) Capacity: 1.5L/2L/3L (optional) Package Includes: Outdoor water bagx1 note: Pay attention to the storage methods.