HammerHead Tuff Feet are 1.5 mm freediving socks intended for warm water and close-fitting fin pockets. Their shaped ankle and open-cell cuff are designed to reduce water movement, while the flexible grip sole adds traction during brief transitions to the water.
The socks are glued and blind-stitched. Check your freediving fin fit with the socks on; even a thin neoprene layer can change the pressure on the toes or instep. These are flexible fin socks, not protective hard-sole boots.