4 Flexpoint Technology: Frame flexes in 4 key areas. Curved lens technology provides expanded 180 degree vision. Quick adjust: just pull the two straps to tighten and lift lever to loosen. Lenses are coated with fogbuster anti-fog for clear vision. Split silicone headstrap fits over the crown of your head. UV Protection Safety tested lenses that protect your eyes from UVA and UVB.