Product Description The Wiley X Guard Advanced (Model 4004) is a precision-engineered, low-profile tactical eyewear solution designed for those who demand uncompromising protection without sacrificing comfort or style. Built around a semi-rimless matte black nylon frame, the Guard Advanced features a quick-swap changeable lens system and ships with both smoke grey tinted and clear polycarbonate lenses, enabling instant adaptation to shifting light and environmental conditions. This model satisfies the MIL-PRF-32432 ballistic safety standard as well as the ANSI Z87.1+ rating for optical clarity, high mass, and high velocity impact protection, making it ideal for shooting, fishing, biking, and other demanding pursuits. A rubber nose piece, adjustable fit, and ergonomic temple design ensure stable, all-day wear for medium to large head sizes, while prescription-ready compatibility extends the frame&';s versatility to vision-corrected users. Product Highlights MIL-PRF-32432 Ballistic Rated: Meets stringent military ballistic safety standards with high-wrap frames and easily changeable lenses engineered for mission-ready performance. ANSI Z87.1+ Certified: Frames and lenses satisfy ANSI Z87.1 standards for optical clarity, high mass impact, and high velocity impact protection, suitable for professional and recreational use. Changeable Lens System: Includes smoke grey tinted and clear polycarbonate lenses that swap effortlessly, delivering superior visibility and full-spectrum protection across any environment. 100% UVA/UVB Protection: Polycarbonate lenses provide distortion-free clarity with UV protection coating, guarding eyes against harmful ultraviolet rays during extended outdoor exposure. Prescription Ready: The Guard Advanced frame accepts custom prescription lenses, making it a versatile choice for vision-corrected users across sport and tactical applications. Specs Brand: Wiley X Model Name: Guard Advanced MPN: 4004 UPC: 712316000321 Frame Color: Matte Black Lens Colors Included: Smoke Grey / Clear Frame Material: Nylon Lens Material: Polycarbonate Frame Type: Semi-Rimless Lens Shape: Rectangular ANSI Rating: Z87.1+ Ballistic Standard: MIL-PRF-32432 UV Protection: 100% UVA/UVB Lens Coating: UV Protection Coating Polarization: Non-Polarized Nose Piece: Rubber Fit Type: Adjustable Fit Size: Medium to Large Product Dimensions: 7.4 x 3.5 x 3.61 inches Item Weight: 0.4 lbs (6.4 oz) Prescription Ready: Yes Manufacturer: Wiley X Sunglasses (Wiley X, Inc) Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.