TOPTIE Men's Compression Base Layer Long Sleeve Top Please check our SIZE INFO in description or picture rather than Amazon's "Size Chart" to pick a suitable size. Tight fit, we recommend ordering ONE size up what you normally wear. Neck tape added for durability and comfort. Fitted long sleeve. 90% polyester / 10% spandex. Polyester fabric for a soft, comfortable feel that pulls away sweat. Please note the fabric of color grey is upgraded which is different from others. Ideal for a variety of training conditions.