The Tifosi Rail Race is the next version of Tifosi's Rail, built with a rimless shield frame and a 2-lens interchangeable system for quick changes as light shifts through a ride. At 1. 1oz (32g), the frame stays light enough to disappear during hard efforts, and vents across the lens keep air moving so fog doesn't build up when the pace does. What Our Gearhead® Experts Are Saying:The rimless shield covers wide enough that I stop noticing wind at the edges of my vision, even tucked into a fast group ride. Swapping the clear lens in as the sun drops behind a ridge takes one hand and a few seconds, so I never lose time digging through a bag for a backup pair.