Excellent Cooling Gel Paks
I have used these gel pack for 4 years.  Just ordered a second set of 3.  They work perfectly.  They freeze very cold yet always remain flexible.  A quick massage of the gel and they readily become pliable making them comfortable to use (no hard edges or lumps).  Retain their cooling properties for very long periods of time. Very sturdy.  After 4 years, none of my packs have leaked or ruptured.
Rating: 5 stars