They are made of soft neoprene, lined on both sides. - They feature a convenient zipper that extends from the sole to the ankle for easy donning. - Water infiltration is reduced to a minimum by a thin, continuous strip under the closure. It constitutes an effective barrier against water that could be infiltrated through it. - A strong non-slip reinforcement covers the entire sole. - The areas above the foot and at the heel are lined with a wear-resistant coating.