By the way, after the car accident on Cayman Brac in 1999, I discovered I felt better after freediving once I returned to the northeast USA because I preferred a 3mm wetsuit for reduced drag. I figured the cooler water "iced" the joints and reduced inflammation. I started diving my 3mm even into 40 F water when scuba diving to see if it would help reduce pain and swelling. It did. While 40 F was freaking cold (but felt good after), I found temperatures in the 60's F & 70's F range to be quite comfy in 3mm wetsuits. So, it didn't start out as thumping my chest. It started out as a way of feeling better. Lots of my freediving students found they liked 3mm better than 5mm too. A couple of my cave students shed their DUI TLS-350's and steel 104's for 3mm wetsuits and AL80's and enjoyed being light and slick in flow caves.