My grandson is an electrician and always has the pads in pocket work trousers, Ive not tried them but Ive got some old really cheap strap on ones that are okay but very noisy and slippery, and a pair of tilers ones I was given made by Vitro,,,,somthing like that, they make tile cutters and the like,,which have a less clackety outer shell and a gel inner, which are much more comfortable to wear. The strap on ones always need adjusting as you go though the better ones less so, and for some reason they pull my trousers up at the ankles! Def don't want to be on your knees without somthing.