Revision Military Sawfly Basic Solar Kit includes frame with adjustable arms, solar lens, head strap, microfiber pouch 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 Z87.1-2050