AmazonCommercialHot & Cold Reusable Gel Pack for Shoulder & Knees, 4.92 inches x 11.02 inches, Pack of 4, with Straps, Blue

This set of ice packs was such a great deal. I used them to ice my hip after surgery and they were perfect. Great size and because there were four, I was able to continuously rotate them as they got warm. They chill quickly in the freezer and don’t take up much space since they are flat.

Better than I expected in cooling and staying cold. Perfectly conforms to the back or legs or arms. Easy folding and storage in the freezer. Great price. Very satisfied!

Fantastic big cold pack. Amazing on very hot days. Not really an effective or long lasting hot pack tho. Gel goes gooey and pockets from gravity. Cools way too fast.

Use with shoulder surgery. I haven’t tried using these guys heated but using cold…they last beyond 20 minutes in use, freeze quickly, built well and good price. If buying again I’d buy the the next size larger. Bigger is better!

Just had knee surgery and needed something to use to life down after workouts. Comfortable feel, easy to adjust around your leg, and stays cold. Family has used them on their back, shoulder, and lower legs and no complaints.

Use one for hot and one in the freezer... works great....

I use cold packs frequently for my back. I’m delighted with this purchase. The packs are large, freeze quickly, well made and comfortable. The price was super for two packs. Great deal; thank you!

I have not used them as warm packs. These are reasonably effective as cold packs. They are fairly light and flexible and they're good for the recommended 20 minutes of use in one spot. But my entire lower leg needed to be iced and they don't stay sufficiently cold for 40 minutes. I do recommend them, with some reservations. There are better ones but these do the job.