Thank you for viewing! This is a Workman "Back Aluminum Warm Inner Suit with Sleeves, Black (purchased Fall/Winter 2025), size L." I usually wear M, but at 174cm and 56kg, the L size, one size up, felt more relaxed. It's almost new as I only tried it on. I'm selling it because I haven't had a chance to use it. The back material is black aluminum that won't peel off even after washing, so it's very warm. Please consider it! Back Aluminum Warm Inner Suit with Sleeves Size: L Suitable Height: 170-180cm Suitable Chest: 90-98cm Chest: 109cm Shoulder Width: Raglan sleeves Sleeve Length: 84cm Waist: 100cm Inseam: 73cm