I stumbled upon the ice sleeve and Walt in Ventura, Ca at an expo. I picked up the extra large for my boyfriends knee but now we both use it. Immediately from the freezer, my boyfriend (64) ices his knee. There after, as it begins to thaw I use it for my hamstring, knees and even shoulder. We are tough on our bodies and I typically shy away from the typical bag of ice, but this ice sleeve is easy to use, easy to freeze, easy to store and very comfortable! I love this product!