Description: - 84% polyester with 16% spandex moisture management fabric - Self-fabric collar - Stretch body fit - Athletic compression pattern fits tight against the body. - Designed as an extra outer layer to provide muscle support and to keep muscles warm. - Moisture management helps you stay cool and dry. - Provides additional layer of protection against minor skin abrasions. - Excellent base layer piece for enhanced performance. fabric 84% polyester with 16% spandex offers stretch and compression. moisture wicking technology removes moisture from skin to outer layer for fast absorption. Men's Garment Measurements