This is a Patagonia Japan original R4 (made in Japan, 4.5mm-5mm thick). I purchased it several years ago at Patagonia Surf Tokyo (Jingumae), but I only tried it on in the store and have never worn it since. I stored it lightly folded in a large storage case. Therefore, there are folding creases around the chest and on the rubber part of the left knee (as shown in the photos), but there are no cracks or deterioration of the rubber. The lining is Patagonia's proprietary polyester-based (with logo) warm fabric. It is a men's front zip model. Size: L (I am 180cm tall and slim) It will be shipped in a large plastic bag or box, so please understand that it will be folded again. Please refrain from price negotiations, and returns after purchase are not accepted.