The CoreKnit Bicep band offers a secure, upper-arm fit—perfect for members who prefer to wear their device off the wrist while still capturing valuable data. Designed to withstand your toughest training sessions, it features an anti-microbial finish for added durability and comfort. CoreKnit dries ~40% faster than Superknit. The CoreKnit Bicep band is not ECG capable. Members with Life Memberships and Medical Grade devices will only get ECG readings while wearing the device on their wrist.