Reviewed by Kelly - 15th May, 2017 Great product - have bought another This is a great water bladder. It doesn't sag like most bladders as it has a solid back plate. It opens wide to fill it and clean it. The water delivers easy through the pipe... previous bladders I've used make it quite hard work biting and sucking the water out, but this is a breeze. I've since bought another one for my husband.