O'Neill Psychofreak ST 3.5mm Boot
Here's what other sites are saying:
If you can't feel your toes after a few minutes in the water, then buck up and invest in the O'Neill Men's Psychofreak ST 3. 5mm Boot. O'Neill's XDS-Air Firewall fabric provides stellar warmth and feels so good you'll almost wish for cold weather. Hook-and-loop straps ensure a solid, streamlined fit, while welded seams reduce weight and eliminate chafing. And O'Neill's new integrated arch increases contact between your foot and the board for better traction and support for easier recovery.