Insole Foot Warmers - Up to 10 Hours of Heat, Easily Apply with Adhesive - Ultra Thin, Easy, All Natural - Air Activated, Odorless Hot Insole Warmers - Sport Temp

These are very warm! I purchased these for my mom. She was going through chemo treatments & her hands and feet were always cold. These really did help!! I also purchased the hand warmers & they work just as great! Super thoughtful for anyone trying to keep warm!

I work 10 hour shifts in a -15 degree warehouse freezer and these have stopped my toes from being constantly frost bitten and last the longest of the various brands I’ve tried! They also have not burst open on me despite vigorously walking on them for hours.

These puppies have saved my toes on icy cold days! Easy to use and work quickly!

Helped keep our feet warm in Washington D.C. for the Inauguration.

I am getting ready for a trip to hike in Alaska. These really do last a long time which will be essential on these hikes up elevation and also for the mornings. There can be a tendency for these to get more hot when walking so just put them on top of the foot inside the boot and that works well too if they are getting too hot from the weight and movement. Highly recommend. FYI, we tried the battery operated stuff. Two brands, multiple purchases and the batteries only lasted a week to six weeks and a max time of about 3 hours despite what they say. Batteries are NOT like our phone batteries. Won't go back to trying batteries again. Also, it is the same battery no matter what brand or product you buy so whatever China company is making the batteries it is a scam. I sticking with this product. We have various versions of these warmers, this brand - works like they say and a LONG time.

Love these. Keeps feet very warm when shoveling snow. Tried putting a pair in my gloves and they were too hot.

I have been a lifelong user of the brand name. I was happy to see these available for about 1/2 the price. I bought the 20 pair box. To say that I have been disappointed is an understatement. 1st issue is they are about 2x as thick as the brand name. Secondly if you rip them too fast off of the sock they tear in half and activated charcoal goes all over the place. 3rd- they don't produce a lot of warmth. 4th-The edge is so thick that it is cutting my toes in my boots. These are not great. I have used about 10 of them. Just going to throw the rest in the trash and go back to the brand name. Save your money and get the brand name.

I bought these to wear with boots in snow in Alaska. I was worried they’d be too hot but they were perfect. They stick to your socks so I placed them closer to my toes as they tend to get cold first, and I was comfortable the whole day