I don't know if anyone else has experienced this or not with the same or similar straps... I have a 3 inch souilder strap, and it's a great strap - however, I noticed while playing the strap slowly gets longer. The sdes of the strap are a seat belt like material and it seems as if it does not provide enough grip for the strap to stay in place. It will get as much as 2 inches longer over the course of a gig.
It gets really annoying after a while!
It gets really annoying after a while!