Attach the MagSafe Battery to your fully charged iPhone Air for all-day use

With Fast Fuel

Heart Rate Monitoring for workouts and exceptional battery life are all enabled by the efficient Apple H2 chip

and a USB-C connector for pass-through charging

Embraced by creative pros in studios everywhere

40mm Purple Fog Sport Loop same day delivery Attach the MagSafe Battery toSoft, breathable and lightweight, the Sport Loop features a hook and loop fastener for quick and easy adjustment. The double layer nylon weave has dense loops on the skin side that provide soft cushioning while allowing moisture to escape. This weave is made with 82% recycled yarn, some of which contains material from discarded fishing nets. The Sport Loop contains 45% recycled content by weight, and 100% of the manufacturing electricity is covered by