5 of the best: cycling helmets

1— Harrier, £150, Brooks England (tokyobike.co.uk) 2 — Stratus, £89.99, Bell (wiggle.com) 3 — S-works Prevail II Team Bora, £175, Specialized (evanscycles.com) 4 — RCC, £250, Rapha (rapha.cc) 5 — Folding, £120, Closca (V&A Shop, London SW7)