Yamato Michi Alpha Vest, size M, color gray. Used on several mountain trips, but I believe there are no noticeable scratches or stains. Below is the official information. Size M: 77g Ultra-lightweight, minimal active insulation. The front uses thick Polartec Alpha Direct (136g/㎡), which combines high heat retention and breathability, preventing stuffiness and overheating when moving, and warming the core when stopped or when wearing a shell. On the other hand, the back, which tends to get stuffy when wearing a backpack, does not use Alpha Direct, but is finished with only a light and airy shadow ripstop. No claims, no returns, please.