Purchased from a Patagonia retail store a few years ago, used 2-3 times. It became too tight due to my size increasing, and has been stored at home on a hanger. My measurements: Height 169cm, Weight 63kg, Chest 94cm ※ See image 6. Before purchasing, I tried on an MS size based on the size chart, but it was very tight and I couldn't even get my arms through it, so I bought a L size. Manufacturer: Patagonia Product Name: Yulex Front Zip Long-Sleeved Top Size: Men's L Features: A top made of 85% Yulex natural rubber / 15% synthetic rubber (polymer content), which is neoprene-free and highly elastic. The natural rubber is sourced from FSC (Forest Stewardship Council) certified forests by Preferred by Nature. Optimal for water temperatures of 18°C to 23°C (※US California standard, add approximately 5°C in Japan). Made in a Fair Trade Certified factory. Thank you for viewing. It is in very good condition, but please understand that it is a used item. I hope that someone who needs it will purchase it.