The ultimate composite rack! As the name suggests this rack is nearly indestructable. It is made of heavy-duty composite materials and perfectly molded and heat-forged to withstand tons of use and a fair amount of abuse. Don't go nuts though trying to prove us wrong, we were able to break one by slamming it repeatedly on the floor. If you have people doing that much abuse to the rack we suggest psychiatry. Anything less than that and this is the rack that will hold up. The edges are rounded for easier sliding and reduced cloth wear.