The Whoop 4.0 Superknit Band is a great accessory for runners and joggers who want to improve their fitness level. It is available in green and is perfect for fitness enthusiasts who want to monitor their activity levels. The band can be used by anyone who wants to track their fitness and improve their performance. The Whoop 4.0 Superknit Band is perfect for people who want to stay active and healthy. The band is made of high quality materials and is designed to last.