In more than 10 years that Ive used synthetics that feature a heatpad, Ive only had one heatpad that was a dud. It had quit working after only an hour after activation. Luckily Ive had a backup, which I had previously purchased at my local camping/outfitters store (which sells them year 'round instead of seasonal).
The rest of the heatpads, as well as the above-mentioned backup, kept on working after 6-plus hours.
Burnt Toast Reviewed by Burnt Toast on . How reliable is the heat pack? I'm just curious at how reliable a heat pack is? I have to drive and wait about 1 hour after I microwave synthetic urine. I plan on taping it to my inner thigh and have the heat pack against it also taped. My only problem is that where I'm going to take the test is an hour drive (plus however long it is to wait to be tested). How efficient is the heat pack on keeping the temperature above 90 degrees? I don't want to get there and have it below and be all "well shit..." Rating: 5