RT1 Magnifiers feature interchangeable 3-position ratcheting bayonet temples and an adjustable head band with each pair. A unique feature of the head band with hook and loop closure is the ability to adjust with one hand while wearing. The RT1 also features full length, non-slip TPR temple sleeves for comfort and grip. A closed cell foam seal provides optimum protection from small particles and debris. The light weight nylon frame and polycarbonate wrap- around lens design provides greater side impact protection. The UV-AF® Anti-Fog coated lens are Eco-friendly and UV cured, providing 3 times greater Anti-Fog performance than generic Anti-Fog safety glasses. Anti-fog lens options include clear, gray, amber, and indoor / outdoor clear mirror in both black and silver frames. Choose the best magnifier safety glasses, choose MCR Safety!