The Matuse is one of, if not THE, best wetsuits on the market as far as full suits go. The scientists [at least that what we call the Matuse folk over there] developed the rubber for this wetsuit out of limestone as opposed to petroleum so its more environmentally friendly. Focussing on comfort and warmth, they were able to figure out what ares needed to be 4mm, 3mm, and 2mm, making it super flexible where it needs to be and super warm where you need it!