This was a gift. The exact purchase date is unknown, but it was purchased at an authorized retailer in Tokyo. It has been stored without being worn. The quality label has been cut off, so the exact material is unknown, but I believe it is polyester. It has a smooth feel, is quick-drying, and has stretch functionality. The size is men's L. Shoulder width: approximately 47 cm Width under the armpits: approximately 56 cm Sleeve length from shoulder seam: approximately 24 cm Length: approximately 70 cm There are slits on both sides. There is a chest pocket. Please refrain from purchasing if you are concerned about minor details. No price reduction.