Light used, I washed it once following the directions attached. I also purchased the insert that allows your baby to face out ($40) so together the set retails for $460 before tax. The visible signs of wear I can find are: lose thread by one of the gold buttons, some very light staining inside the wrap (where it goest around your baby) so you would never see it. I haven’t tried treating it, I only washed the whole thing once on a very gentle cycle with gentle detergent.