Can't use boiling hot water
Pain relief is good if you use boiling hot water.<br />So far it was leak proof.<br />Directions says you can't use boiling hot water.  The plastic is thin so I'm assuming it would melt the plastic over time if you used boiling hot water.  What is hilarious is that you need boiling hot water for the heat to go through the plastic and the sweater it came in.<br />Everytime I buy anything made in China I get severely disappointed.<br />Next paycheck, I will get a bladder with better quality, that can handle ACTUAL hot water.  In the meantime, I will tolerate this for the sake of my aches and pains.
Rating: 2 stars