Techni Ice HDR 4 Ply Reusable Ice and Heat Packs for Back and Shoulder Injuries, Keeping Medications Cool, Keeping Food Fresh, and Reducing Power Usage in Refrigerators (12 Sheets)

These are phenomenal! I have used them for years. Several times it has been 90 degrees all day and they keep everything frozen. We do have a good large ice chest but these ice cubes work so well, I highly recommend them!!

I have bought this product several times. Great product made with good materials..and lasts!

Have been buying these for years and they are the best ice packs for coolers. They get super cold and stay cold for long periods. Annoying to activate but worth it. I fill the tub and do a bunch at once. Then set them out and dry off before stacking in freezer

for me, better than the softer gel packs....gets extremely cold and hard, and stays cold for many hours in a cooler

I love these sheets of ice. Have been using for about 20 years and always have in the freezer when I want to go shopping and bring my ice chest. Also have cut into smaller squares to use on an injury.. so easy to keep on hand and I find using two sheets in my smaller chest keeps things cold for several hours.

I was really excited about this product after reading what it could do. I was hoping to use it for shipping frozen fish around the country (our side business). While I was hesitant to believe it would work for quite as long as detailed (up to 6 days with 5lbs dry ice) I assumed it would work for at least 48 hours.I wanted to get the maximum results and froze all of my sheets with dry ice in a cooler for 24 hours. They were extremely cold. I was pretty excited but wanted to test how long they worked with dry ice in the recommended 1.5 inch styrafoam shipping cooler. I put 5lbs dry ice with 4 techni sheets in a small 8 gallon cooler with frozen salmon packed solid with newspaper and bubble wrap. I also set up an identical cooler with only techni ice and fish, also packed solid. I was hoping the first could be for 2-3 day shipping and the second would work for overnight shipping.Only 20 hours later I had no dry ice (to be expected) but the techni ice packs on the top were mostly THAWED and the main problem - the once frozen fish was SOFT to the touch. The packs on the bottom were still frozen soild. The techni ice sheets in a cooler with no dry ice (but had been frozen at dry ice temps) were all thawing and the fish was also thawing. Totally not acceptable or consistent with the product's claims.I am totally shocked how a company can get away with the claims they make. This product is USELESS for shipping because it doesnt stay cold enough for long enough. You cant even overnight fish and expect it to be frozen in 24 hours. There is nothing special about these ice packs except for the slimminess that will probably make me choose a different pack in the freezer. I only hope enough people read my review so they dont buy them expecting them to last any longer than a normal ice pack - even when frozen with dry ice.

We have used these for years. Stays frozen for along time. With these we use less ice in our coolers. After awhile they disintegrate and have to be replaced. One thing I don't like is they do get slimy even though it says they won't.

I thought these were great when a friend of mine had them and showed them to me on a trip to the lake. Excitedly bought them and threw some in the freezer. I quickly found out they leak or something because there is a layer of slime all over them. I tried different ones to see if it was just one or two that did it but all I tried did the same thing!! Waste of money unfortunately.