Churchill® Fin Tethers The Churchill fin tethers are a must-have accessory for any bodyboarder or swimmer. These high-quality tethers help keep your swim fins secure, reducing the risk of losing them in the water. The comfortable neoprene ankle strap ensures a snug fit that won't rub or irritate your skin, even during extended use. Whether you're a seasoned pro or just starting out, the Churchill Fin Tethers are an essential addition to your bodyboard kit.