Surfers usually wear a leash around their ankle that is connected to the surf board. They used to weigh 125 pounds. Some beaches require surfers to use leashes. Surfers wax the top of their boards so they won't slide off the board. Today they are made from Styrofoam and fiberglass.
Most surfboards have a stabilizing fin on the back.
Winter surfing is safe and fun if you have the right equipment. You do not feel cold surfing in the winter because the winter suit keeps the surfer dry and warm. If your wet suit and boots fit properly, very little water will get in. Your body warms this liquid and it acts like insulation. The suit, boots and gloves are made of neoprene.