Sporty Replacement Wristband: The clasp is made of high-quality water-resistant and durable silicone that feels comfortable around your wrist. A sporty bracelet for training and leisure Adjustable length: The Polar Vantage armband is adjusted by means of a buckle to fit perfectly around your arm. Easy to change: Change the bracelet according to the occasion or when the old one is worn. It's easy and tools and tension pins are included. Specifications: Color: Black Size: 22 x 133mm + 22 x 81mm Fits for wrist somets: 144-226mm Material: Silicone Compatible with: Polar Vantage V Package includes: 1 x Klocem 2 x Tool 2 x Tension Pin