Sharing from a my friend.
I helped a friend buy 3 Teviron Body Warmers, curiously I asked her why she needs so many? She said this is very good, as she has back pain problem and cant go for a 5km walk without this.
I can only share this much as I dont have much details of her using them, like how long, when and so on. I suspect she may need to wear them for her 5km walk.
Teviron Body Warmer
Pictures source from Nefful Singapore Holdings Pte Ltd
