Abstract: A watertight swim cap has a rear skullcap section which is fabricated of silicone rubber material. The skullcap section is configured to substantially cover the head of a swimmer. A front rim section of the cap is fabricated of a silicone rubber material which is softer than the material used in the skullcap section. The top edge of the rim section is fused to the bottom edge of the skullcap section to form a single integral cap which, when worn by a swimmer, provides a watertight seal between the cap and the head of the swimmer.

Abstract: A cap includes a flexible body having a dome shape for conveniently conforming to a swimmer's head. The body includes an outer layer and an inner layer spaced from the outer layer such that a cavity is defined therebetween. The inner layer is provided with a plurality of conduits and a strap is integral with the outer layer and travels about a circumference of the cap. The present invention further includes a mechanism for effectively removing the stagnant air such that the inner layer can effectively maintain surface contact with the swimmer's hair and cooperate with the strap for preventing water from entering beneath the cap.