About This

• 4-Way Thermal Protection: Enhanced insulation through bladder wall, tube sleeve, bite valve cover, and dual-seal top. UTOBEST water reservoir keeps water cool for up to 12 hours or warm for 8 hours, ensuring stable temperature in any environment
• 3-Layer Insulated Material: Built with TPU–Insulation Cotton–TPU triple-layer construction for superior thermal retention. Performs reliably in extreme conditions from -20°C to 50°C (-4°F to 122°F).This 3l hydration bladder is extreme temperature resistance
• Ultra-Light Freedom: UTOBEST bladder weighs less than a cup of coffee with a 16mm thick body, providing strong insulation without adding bulk. This hiking water bladder is designed for long-distance runners, hikers, and outdoor athletes who value efficiency
• Upgraded Dual-Seal Closure: Leak-Proof double-layer sealing system prevents leaks and heat loss. The wide slide top of 3 liter hydration bladder allows easy filling and cleaning while maintaining a secure, temperature-locking seal
• 360°Rotatable Bite Valve: Flexible, bite-to-drink design enables smooth water flow from any angle. One-handed operation keeps hydration effortless during runs, hikes, and rides. This hydration pack bladder is easy one-hand drinking