Fourth Element Xerotherm Beanie Thermal Hat, offers superb thermal protection for a variety of outdoor activites from skiing and snowboarding, rambling or just messing about on the boat. Effective wet or dry, the beanie hat is the ideal thing to stash in a dive bag, or even the pocket of a BCD to put on to warm up after a dive.

The Fourth Element Xerotherm range of garments are constructed from specialised Polartec® fabric, originally developed for NASA.