I've used this a few times, but the size is quite tight. I usually wear M to L, so I'm selling it because I don't use it often. 1. Product Overview This is the high-performance base layer "Drynamic Mesh Sleeveless" from the French mountaineering and outdoor brand, Millet (MILLET). It's a high-performance innerwear designed for all activities that involve sweating, such as mountaineering, trail running, and winter sports. 2. Features and Benefits Ultimate Dryness: The uniquely developed water-repellent polypropylene material and three-dimensional mesh structure quickly absorb sweat and spread it from the skin to the clothing. By keeping the skin dry at all times, it prevents chills from sweat and supports body temperature regulation. All-Season Compatibility: It's cool in the summer due to its breathability, and in the winter, the air layer created by the mesh acts as insulation, providing warmth. It allows for comfortable activities throughout the year. High Popularity and Reliability: It's a best-seller for Millet and is highly trusted among mountaineering enthusiasts, who say, "You can't live without it once you wear it." It's perfect for those who want to try a high-performance base layer. 【Related Hashtags】 #Millet #MILLET #DrynamicMesh #Mountaineering #TrailRunning #Outdoor #BaseLayer #Innerwear #HighFunction Color...Gray系 Stains, tears, odors, etc....None