Cosmos 3 Pcs Elastic Lycra Swimming Caps 3 Caps per pack. Black Color Snug fit keeps hair pulled cleanly away from face and neck while swimming. Stretchy material: Lycra fabric dries quickly. NOT waterproof. Elastic band at the bottom of the cap to ensure a secure comfortable fit. Universal size, one size fits most. Suggested for Head Circumference less than 24 inches round.