The Ocean Band is moulded in a high-performance elastomer with a tubular geometry allowing it to stretch for a perfect fit, even over a wetsuit. The corrosion-resistant titanium buckle and adjustable loop secure the strap during high-speed water sports. For extra length, an extension strap is sold separately — perfect if you need extra length to wear the strap over your wetsuit. | Apple Watch 49mm Ocean Band - Neon Green/Black