Spitfire - Formula 4 Conical 52mm 99a bones and athleisure ensembles

and athleisure ensembles

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

Formula Four Urethane - Unmatched abrasion resistance for fewer flat spots

Spitfire - Formula 4 Conical 52mm 99a bones and athleisure ensemblesKey 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.