The Cressi Bubble Swim Cap made from thick durable silicone which has a soft to touch internal so the silicone doesn't drag on the hair quite as much as more basic silicone swim caps usually do.

Stand out from the crowd with this adult swimming cap with its retro bubble effect.  The bubbled silicone has a really practical element - not only does it allow greater flexibility to accommodate larger heads or those with more/thicker hair but the bubble effect also helps encourage thermal protection by trapping air to help insulate the head. 

The superb ergonomic design of this Cressi Swimming cap also ensures it can accommodate a lot of hair while the flexible soft silicone provides a comfortable secure seal.