Under Armour M Tac Operator LS Size:Medium Batteries can be replaced while Batteries can be replaced while the light remains mounted on a gun Compact Design: Lightweight and designed for easy attachment to your tactical gear Constructed from 91 percent polyester and 9 percent elastane for durability and stretch UA Storm technology repels water while maintaining breathability Durable stretch woven fabric with soft brushed interior for added warmth Woven elbow overlays provide extra durability in high wear areas Secure zip hand pockets and chest pocket for safe storage Pen pocket located on the left sleeve for quick access Binding on cuffs for a clean secure fit Looser fuller cut for enhanced comfort and mobility The Under Armour Men's Tac Operator Jacket delivers lightweight performance with 100% polyester construction a crew neck design