Rooster Hot Socks - a revolution in warmth - A 0.5mm titanium layer that is both comfortable and warm. Wear them under your normal sailing boots for extra warmth - remember layers are better than thickness! Titanium neoprene acts in a similar way to a survival blanket, the titanium impregnated reflective layer is sandwiched between the neoprene and the interior nylon lining, this lining reflects radiated heat back to the body.