So last time i went to a shop I had the opportunity to buy two towel grips. One for myself, and one for my friend who accompanied me in the cold weather. I had not the chance to use it yet, but my friend did. He showed me his NS 9900 with yellow towel grip. And when I holded it, it felt insecure and unsafe in my hand, as if it was going to slip away the moment I tried to smash with it(btw My friend and I don't have sweaty hands we just wanted to try for the heck of it). When we played together, twice did he lose his grip, and once he dropped his racket. The towel grip's name is like AC402EX. Are all towel grips originally like that? Or is it just that it only works for people with sweaty hands?