Fursuit making is an odd profession in that we need to cover everything head to toe and so need to be experts in a wide variety of things that are normally a specialized profession. One thing I am always trying to perfect is what variety and combination of foams and soling materials I use in my feet for the most comfortable and long-lasting experience. They need to be soft but supportive & stand up to many hours of activity without crumpling or sagging. To this end, I buy a wide variety of materials including professonal soling, gym mats, orthopedic foams, filter foam, and anything else I think will best serve my costumers! I take a lot of pride in my feet construction and design ^_^