Come and see our amazing products! Hydration pack have thick insulated layer ,the insulated bladder compartment keeps your liquid cool or hot for up to 4 hours.The 2L liner inside detaches from the backpack for easy cleaning and assembly. The rubber mouthpiece has a simple switch valve to stop water flow when needed, ensuring a leak free outdoor experience. Internally the hydration pack contains a separate pocket for other items, such as a phone, first aid kit, and snacks. Adjustable straps help tailor the hydration pack to your needs. The hydration pack is your perfect choice for cycling, camping, running,music festival, rave , kayaking. Pls confirm further with us if any query about packing info, inventory status and time schedule.