1.Versatile : The fully adjustable headband creates optimal conditions for athletes of all age groups through its progressive adjustment technique. The double rib structure increases slip resistance and minimizes position loss even with dynamic swimming styles 2.Comfortoptimized technique: Specially developed seam processing and stretchable material combination enable a high range of motion without constriction in all swimming styles 3.Comfortoriented design: Ergonomically shaped ear pads minimize pressure points and friction. The waterrepellent bandage sits stable without slipping and enables long, pain swimming training through even weight distribution around the head area 4.Multifunctional use: Ideal for swimming lessons, snorkeling trips and water sports. Universal fit for different head sizes for young and old. Particularly skinfriendly material with nonslip edge for maximum dom of movement in the water.