Optrel® Crystal 2.0 (Silver)The Optrel Crystal 2. 0 (Silver) welding helmet with Crystal Lens Technology (CLT 2. 0) surpasses previously set industry standards for protection and light transmission. For the first time, welders and metal fabricators have a practically clear view of the working environment with a 31% light transmittance and a protection level of 2! The clear view in bright state makes the crystal 2. 0 the ideal combined helmet. Now you can see whats really going