Spitfire - Formula 4 Conical 52mm 99a bones supporting a comfortable fit from

supporting a comfortable fit from morning until evening

Formula Four Urethane - Unmatched abrasion resistance for fewer flat spots

Construction: 7-layer

Soft-knit design enhances comfort and provides a snug feel against the ears for all-day wear year-round

Classic black finish with Diamond Vision styling makes it easy to mix with any outerwear

Spitfire - Formula 4 Conical 52mm 99a bones supporting a comfortable fit fromKey Features Formula Four Urethane Unmatched abrasion resistance for fewer flat spots. More controllable grip. Lasting speed no matter the terrain. Smooth anti slick slide and a longer lasting size and shape. Wide profile More traction and stability at high speed so you'll be less likely to slip out of your line.