High-Quality Materials: The inner layer of this water bladder is made of PE material and the outer layer is made of EVA material, which is durable, corrosion-resistant, BPA-free, odorless, non-toxic, and safe to drink.

Leak-Proof Design: The inner lining of the water tank has passed the air pressure test and is completely pressure-resistant. The double-sealed side technology significantly improves durability. It automatically closes when the hose is removed, and the 2-liter water tank remains full of water without leaking.

Large Opening, Easy to Fill and Clean: The wide opening is large enough for your hands to clean the water bladder, making it easy to refill water and add ice cubes. The large opening allows you to reach the inner corners to thoroughly clean the water bladder.

2L Large Capacity: This water bladder has a capacity of 2 liters. It is the best choice for outdoor sports, enough for hiking, cycling, climbing, running, or cycling for a day's drinking. The size is 40 x 17 cm.

Perfect for Hydration Backpacks: Compatible with most hydration backpacks, just fill with fresh water and put it in your backpack. To hydrate, gently bite the valve and sip like a straw. Suitable for various outdoor activities such as hiking, cycling, marathon, camping, mountaineering, running, skiing, jogging.