Dual-Layer Insulation: Equipped with 50mm thick insulation material and a thermal aluminum foil lining, this hydration bladder sleeve keeps your water cool in summer and prevents it from freezing in winter. Perfect for outdoor adventures in any season! Spacious & Versatile Storage: Designed to fit 2L or 3L hydration bladders, this insulated sleeve provides enough space for water bladders, snacks, or drinks. The interior buckle keeps your hydration pack securely in place while on the move. Durable, Waterproof & Tear-Resistant: Made from high-quality, waterproof, and tear-resistant material, this hydration bladder cooler bag withstands rough outdoor conditions, ensuring long-lasting durability for your hiking, camping, or cycling trips. Convenient Carrying: Designed with a sturdy handle for easy carrying, this insulated sleeve can be carried by hand or packed inside your backpack. The strong hook and loop (Velcro) closure ensures your hydration bladder stays secure. Ideal for Outdoor Enthusiasts: Whether you’re hiking, cycling, camping, or running, this lightweight yet protective hydration bladder insulation sleeve keeps your water at the perfect temperature. A must-have gear for adventure lovers! UTOBEST - Always on the way! UTOBEST, stems from “be the best version of you”. Offering great outdoor gears for you. We are young but not afraid of challenges.