The Watercell X is made from an RF welded durable TPU material bonded to a 400D face fabric, it contains an internal baffle to retain its shape.
The multi function cap has a both large and smaller opening which accepts a shower fitting. There is also an optional hydration tube with bite valve for personal hydration.
There is also a side strap which can be used to carry or hang the Watercell.
Coming in 4, 6, 10 and 20 liter versions from www.seatosummit.com.