KEEP COLDING: KUYOU Hydration pack have thick insulated layer ,the insulated bladder compartment keeps your liquid cool or hot for up to 4 hours.

COMPACT& LIGHTWEIGHT : This Hydration packs are designed specifically for road cycling /running/ Hiking ,So that's Compact and low-profile so they feel light and stable on your back and won’t create a ton of wind resistance ,keep your body functioning at peak performance whether you're training for a marathon or cycling.

PROFESSIONAL 2L HYDRATION BLADDER: Hydration bladder is made of premium TPU material. Our hydration bladder passed the pneumatic pressure test, 24-hour swing test and 24-hour vibration test. Large opening is easy to clean and add ice cube. 135 degrees rotatable mouthpiece allows for easy drinking.

COMFORTABLE & RELIABLE: Ergonomically fits for your shoulders, chest, and waist,3 straps are all adjustable for reducing bounce,You'll never lose our balance because of the water load,Soft air mesh back speeds up air-flow and makes your back cool. Foam padded shoulder straps are extremely comfortable.

VERSATILITY : The hydration pack is your perfect choice for cycling, camping, running,music festival, rave , kayaking. A decent Holiday Gift for families and friends who love outdoor sports.If KUYOU hydration pack did not meet your expectations or if you need a replacement, please do not hesitate to contact us .