Built for long shifts and high output, the 410 Active Shirt is a high-performance compression base layer designed for law enforcement, military, and first responder professionals. Engineered to be worn under duty gear or on its own, it delivers a locked-in fit that moves with you and manages heat when the work doesn&';t slow down. Named after the standard four 10-hour law enforcement schedule, the 410 is built to perform from hour one to hour ten-and beyond. Super-light Freedom-Flex fabric provides powerful compression without added bulk 4-way stretch construction allows unrestricted movement in every direction Advanced moisture-wicking material pulls sweat away and dries fast to keep you cool and comfortable Ultra-tight compression fit delivers a true second-skin feel for all-day support