Nexcare Adhesive Heat Patch 5-pack

expiry on these tends to be short, worth checking the batch date before stocking up on a 5-pack

does this work on lower back or is it sized more for shoulders

the self-heating kind never goes as hot as you want and always hotter than you expect when you forget it's on. every time.

the marketing says 'up to 8 hours of heat' which is doing a lot of the selling here, wonder if the actual warmth level holds up past the first two hours or just goes lukewarm quietly