Great Elasticity Fit – Good stretch property fits most head circumferences, stable not easy to slip off during exercise. Wide Sports Application – Ideal for daily swimming, surfing, diving and other water sports, practical for adult women use. Premium Soft Silicone Material – Flexible and skin-friendly, texture brings comfortable wearing experience, no tight oppressive feeling. Easy Clean Durable Use – surface is quick to rinse clean, wear-resistant and not easy to deform for long time use. Excellent Waterproof Performance – Tightly fit head to effectively block pool water, well ears and hair from getting wet.