is put on, followed by swim goggles over the latex cap, and then second snug silicone swim cap is fitted over both. English Channel swimming rules for swim caps The English "Channel Swimming and Piloting Federation" and the "Channel Swimming Association" state that "one standard swim cap" may be used for official English Channel record swims. The cap must be approved by the official observer who accompanies the swimmer on the pilot boat across the channel. "Standard swim caps" that have been used by English Channel swimmers of record over the years include solid rubber "tank" style swim caps, molded rubber swim caps with chin strap, bubble crepe rubber swim caps with chin strap, silicone swim caps and latex "racing" swim caps. Swim caps that have neoprene within the cap construction such as the "Barracuda Hothead", or that are completely made of neoprene are not allowed for record English Channel swims. Several other long distance swims such as the Santa Catalina Channel California swim have similar rules for record swims. Swim caps worn for open water swims should be of visible colors that contrast with the water so that observers may safely monitor them, and operators of vessels may see them. References Caps Caps