Men’s ‘Extreme Runn’ running trainers from BOSS Green. Crafted from a blend of textile and tonal leather, the lightweight trainers are fitted with a comfortable synthetic sockliner, and feature an innovative three eyelet lacing system and reflective branding to the outer sides. Set on a lightweight sole, the low top trainers are finished with perforated detail to the heel, a textile lining and a grosgrain heel pull tab. Upper: Textile/Leather. Lining: Textile. Sole: Other.