Review on CKE Hydration Backpack 70 Ounce Climbing by Chase Shetler

I use this product for work as I work in an old warehouse with a rebar crane! the water expands so don't burst your bladder) And I put it on in the morning and it helps me have a block of ice on my back and around 10am at work I put it in the freezer and get it back 11 :30pm after my lunch 30 and the ice cream lasts until I finish at 2:30pm. Much better to have than not to have in this heat! The only downside I've seen is that it's difficult to make sure all the water dries out of it, but since I use it as an ice pack anyway, that's not a problem for me!