Building on the runaway success of the rimless Kerosene and Rydon designs, the KALYOS brings a strong value proposition to athleteswhithout compromising function or style.Using Quick Change technology the Kalyos lenses cn e easily changed to manage any light condition. The 8 base wrap architecture insures maximum protection from the elements. Adjustable nose pads using Ergonose II allows wearers to prevent fogging and eyelashes from touching - common problems with competitors. The stylish temples side metal emblems and Safety Project hinges give the Kalyos its unique technically cool look and allow an elastic strap to be added for endurance sports.Need Prescription? No Worries. The Kalyos uses the ingenious optical clip found in Rudy's Ekynox SX.