Swimming bubble Crowell Java yellow col.11 Crowell cap is a tested suggestion for people with long hair. Hair hidden under a cap they fall on the eyes, face, they just don't impede swimming. The model protects the hair and skin of the head against the harmful effects of chlorine and other measures. in added to water. The thick rubber construction with bubbles filled with air on the top layer provides an effective barrier to the cold. Material: 100% rubber