Spitfire - Formula 4 Conical 52mm 99a bones versatile silhouette that layers beneath

versatile silhouette that layers beneath jackets or over hoodies without adding bulk or stiffness

Formula Four Urethane - Unmatched abrasion resistance for fewer flat spots

plus helps keep the fit snug during active days

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

Make a bold statement with the Women's Deathsticks Tank

Spitfire - Formula 4 Conical 52mm 99a bones versatile silhouette that layers beneathKey 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.