Ultralight

Four frames between 25 and 29 grams. The Cheetah is the lightest in the line at 25 g of TR90 and polycarbonate, then the K153 and TK404 at 28 g and the polarized X170 at 29 g. Three contact points, an adjustable nose pad and two silicone temple tips, carry that weight without a pressure point on the bridge. Weight is what you notice at hour three, not in the first ten minutes.