YONEX Long Sleeve T-Shirt, Fleece-lined HEAT CAPSULE M "HEAT CAPSULE" is a thermal insulation material for clothing developed by YONEX, a sporting goods manufacturer. Features: * Heat Generation and Heat Retention: Absorbs infrared rays emitted from sunlight (outside) and the human body (inside), converts them into heat, and stores them within the fibers. * Warmth: This system keeps the inside of the garment approximately 3°C warmer compared to ordinary cold-weather materials. * Applications: Widely used in various cold-weather and thermal insulation products such as training wear for badminton and tennis, snowboarding wear, and gloves. How about it for those who play sports (tennis, badminton, soccer, etc.)? Size: M Please refer to photos 10 and 11 for measurements. ⭐️ Lightly used, in good condition and can be used without any problems. [Please understand the following] Regarding used clothing, there may be minor damage or stains that are not visible in the images. Please understand that these items have been handled by people, and we appreciate your purchase. ※ Shipping will be done compactly folded, so please forgive any creases. Also, we plan to ship via Yu-Yu Mercari Delivery or Raku-Raku Mercari Delivery.