O.K. so I'm not sure which is Hook and which is Loop, so I ordered both. Trouble is, when they arrived there was no Thomann stock number on either! I am using a Gator Gig-Box pedalboard and guitar stand, which is covered in the soft felt-like material. The pedals require the harder, firmer stuff to be stuck under them. Well, one of them is the right stuff! All the pedals are now firmly attached and everything is fine.