Custom ProPutt Sytem Green with TrueStrike Hitting Mat & Chipping Pad in Unofficial Reviews Posted 13 minutes ago I ordered two sets of their “break kit” which are .25 and .50 inch thick sheets of closed cell foam. I used them along the sides to actually level the base (it goes between the base panels and the ground) and to build up a corner so I had an incline up to a hole. I could probably find something similar at a Lowe’s or Menards - but I honestly wasn’t sure what they were referring to. Now I know. Easy enough to slide in, and out, move around when I want to.