ESS Eyewear 740-0531 Crossbow Frame - Terrain Tan Includes a Terrain Tan, Tri-Tech Fit Crossbow frame and nosepiece Also available in Black and Coyote Brown. Recommended for use without ear cups (See Crossbow Suppressor for ear-cup-compatible frame) The Crossbow Tri-Tech Fit Replacement Frame (Terrain Tan) is compatible with all ESS Crossbow and Crosshair lenses provides a universal fit with max comfort and zero pressure points