THERMAL INSULATION - With the insulated bladder compartment, your drink can be kept cool for up to 4 hours, that's cool GOOD VOLUME - Includes 3 storage compartments that will fit your clothes, keys, purses, phones etc. the front stretch mesh pockets allows you to pack even more on your hike 100% LEAKAGE PROOF DESIGN -The opening is large design, you will never be bothered to dry the bladder as the screw one, just bottom up, it will dry itself, with click in connection instead of traditional screw one, it will never get loose and causing leakage PERFECT OUTDOOR GEAR: Padded shoulder straps, breathable system and lightweight design are the perfect tool for outdoor sports Designed for outdoor enthusiasts, this pack boasts padded shoulder straps, a breathable back panel, and a lightweight build, making it comfortable to wear even on longer trips. Whether you're out hiking, cycling, running, or just exploring the great outdoors, this hydration pack is your go-to companion for staying hydrated and comfortable. Perfect for: Hiking, biking, running, camping, traveling, and all outdoor sports.