The strap is thick enough for phone clips. A few tips for those of you who use a cell phone belt clip to carry your cell phone: You need a belt that is thick enough to prevent the belt clip from moving. If the belt is too thin, the contact between the clip and the belt will become loose. The Consequence of a Loose Phone Clip: If you are accidentally hit by someone, your phone could fall in the middle of the road or worse, onto the subway tracks. This strap is thick enough to hold your phone's strap clips.