M's R1 LITE YULEX FZ L/S Top patagonia Men's R1 Lite Yulex Front Zip Long-Sleeved Top - Size M - Brand: patagonia - Size: M - Material: Yulex Rubber 85%, Synthetic Rubber 15% Gender...Men's Thickness...~2mm This is a size M wetsuit made of Yulex material. I purchased it for SUP race training during the winter. I wore it with a long john, but it felt too hot for long periods of paddling, so I stopped wearing it. I haven't used it for surfing, so there are no wax stains or abrasions. Regarding the fit: I am 175cm tall and weigh 70kg, and I felt it was a bit small. I usually wear size M or L in Patagonia clothing. Thank you for looking.