Seac Anatomic Neoprene Freediving and Spearfishing Socks 3.5mmSeac Anatomic Socks are available in 3. 5, 5 and 7 mm neoprene specially designed by Seacsub for greater comfort during freediving, scuba diving and snorkeling. Seac Anatomic neoprene socks prevent heat loss and leave your feet warm. Moreover, they allow a more comfortable fit both of the full foot fins and of the open ones with a strap, as if they were rigid sole shoes. The smooth effect of the neoprene at the ankle ensures greater adherence to the