Revision Military Sawfly Basic Photocromic Kit includes frame with adjustable arms, photocromic lens (light adjusting), head strap, microfiber pouch & case with belt clip Lenses made of indestructible, optical grade polycarbonate that can be interchanged quickly for various light conditions and provide 100% protection from harmful UV-A, UV-B and UV-C rays Scratch-resistant coating on both sides of lens; resists wide variety of chemicals, including DEET Precision manufactured lenses ensure distortion-free vision, full side impact protection and anti-fog performance High velocity impact performance of the Sawfly System is 3-times greater than required by EN166 Clause 7.2.2 and AN SI Z87.1-2040