Doesn't bunch up anywhere, including sides, front or back.
These pads are useful, but they tend to bunch up as your bitch moves around during delivery.
Also, make sure your jacket is fitted in the shoulders without straining or allowing extra material to bunch up or poke out.
Too big: If your socks are too big, they will bunch up inside your shoes and possibly causing blisters.
The cover is made to fit tight over the Balance Board so it doesn't slip or bunch up.