I am a bilateral below the knee amputee who uses a wheelchair, walking assistance devices and prosthetic legs and was issued a Comfort Sports Pro about 2 years ago. It is getting worn out and i didn't know the specs on it since it was issued to me while in rehab. I found this company online and their Customer Service Rep, Sylvia stayed in communication with me over a span of 3 days while I wrestled with my current cushion to find measurements, tags and what the insides are in my model. It's hard to gather this information when you are in the wheelchair sitting on the cushion! These cushions are custom made I recommend this company and their products to anyone needing proper sitting for any reason