Icebreaker Bike Ultralight Mini Mens Socks. Offering a cycling specific design- these ultralight socks provide maximum comfort & wicking performance due to their Merino wool construction. Features Archilles support Instep support Reinforced heel & toe for durability & strength LIN toe seam to prevent blisters Breathable flat zone for air circulation Y heel construction to prevent slips & enhance fit Asymmetrical toe box for a better fit