DELTA glasses draw inspiration from 1980s and 1990s styles. The frame is made of TR90—a material composed of nylon and carbon fiber—which is biocompatible and hypoallergenic, even after prolonged use.
If you get a flat, the Air-Liner insert expands to fill the void, keeping the tire seated on the rim and letting you ride up to 30 miles (50 km) while flat. No roadside repairs needed!