What size? I'll send you mine.
I ordered one like that, that goes along the back of the leg, but find it unbearable to sleep in. My foot really wants to point, causing the heel to slide up and it became really uncomfortable on the forefoot strap.
I ended up trying another like this
that would suck on it's own, but with the extra wrapping from the heating pad works out well. The heating pad has an led indicator too, leading to a phenomenal space-boot look