This High Sierra hydration reservoir is a 2L water pack that is brand new and never used. It is perfect for hiking or biking and comes in blue color. The reservoir has a hidden compartment and a closure that is described in the product description. It is compatible with different products, as stated in the aspects section.

The material used for this hydration reservoir is described in the product description, and it is suitable for unisex adults. The capacity and size of the reservoir are also mentioned in the aspects section. This product is perfect for those who love hiking and biking.