Great packs!
Great set.  They work AMAZINGLY well.  Just push the button when you want heat, lasts about 30-45 min of good solid heat.  Just boil them back to clear when done and they are reset and good to go again.  For best results after activating them, massage the pack to break up crystals a bit.  you get much more heat out of them that way.  Will buy more of these in various sizes.  Seriously people, read the directions, follow them, and these are amazing reusable heat packs.
Rating: 5 stars