Popmask Big Hug Self-Heating Patches for Period Pain Relief, Natural Heat Therapy for Menstrual Cramps and Bloating Relief, Lasts for up to 12 Hours, 5 Scent Free Patches

I was skeptical about buying these, thinking they wouldn't last more than an hour, but I've been proven woefully incorrect. The patches are larger than I expected, which is good! Once you open the package it will start heating up it takes a few minutes to get really heated, if you're looking for something that gives you the heat of an electric heating pad this isn't it, it gets hot enough to turn your skin red but its a very comfortable manageable heat, a little bit hotter then hot hands. So far a single patch has lasted 10 hours and has only cooled down a little, you can rub the patch to generate more heat when it does cool down. Obviously don't put the adhesive side directly on your skin, It's to be placed on your clothes. My only criticism is that the adhesive could be stronger, I've taken it off and on to readjust it, and it still sticks fine but could be better.

These ones actually last 12 hours, if not longer. They get hotter than any other patches I've tried, which is perfect. Genuinely the best. If you put them directly on skin, you can get a second-degree burn, which is about as hot as I could ask for!

Works great!! Heats HOT!!!

My daughter suffers from terrible menstrual cramps, these have been a life saver. She would recommend them to anyone.

These are a FAR superior option to any other self heating pad I’ve bought! They actually get hot and stay hot and truly provide pain relief for my terrible cramps. It’s the next best option to a heating pad. And they stick well - actually perhaps too well. Which leads me to my only complaint. The pad got so super stuck to the inside of my panties that as I was struggling to get it off it ripped in half and the internal iron shavings flew all over my kitchen. Of course my dogs and cats were immediately trying to investigate which could be super harmful to them. I also have old wood floors so they were in every crack and crevice and SUCH a mess to clean up. Of course this was a user error, and will not deter me from purchasing or using this product again, but I feel like a. either the pad needs to be stronger to prevent ripping open or b. the internal filling needs to be more solid or contained in a separate internal pouch for extra protection. There is a HUGE warning on the back to keep out of reach of pets (and children) because it contains iron. I could never have anticipated the explosion of iron shavings that rained all over my kitchen. I’ll definitely be much more careful next time, but wanted to give everyone a heads up on this!

These stay hot ALL DAY! It’s worth it. Beat heating pads I’ve ever used.

We like them, they are perfect for traveling/school/work. For some others they get really hot for my girls but these seems to be comfortable and doesn’t get to hot, but durable and adjustable. Ease to use will get more.

Heats up……but burned skin. I now have blisters.