For all seasons and all types of water, this classic Bubble Cap can help you tackle swimming in low temperatures head on, whether you prefer to train in cooler indoor pools or open water. Features: The bubbles on the cap are filled with air which will keep your head warmer than normal silicone caps Helps achieve a smooth flow through the water Protects hair against chlorine damage Easy to put on Comfortable to wear Won't snag or pull hair Long-lasting and durable Speedo Bubble Cap