Compressport R2 Oxygen Calf Sleeves Sandals - Large front storage for

- Large front storage for water

valine (the three branched-chain amino acids)

at the two-hour mark and beyond

Battery: Built-in 2000mAh Li-polymer battery

Compressport R2 Oxygen Calf Sleeves Sandals - Large front storage forThe best calf support for running, the R2 Oxygen is a must have for all athletes looking for high performances and superior comfort. Initially designed to meet the needs of our pro athletes racing in events as extreme as the IRONMAN World championships in Kona, the R2 Oxygen are highly ventilated, ultra light and exceptionally comfortable. Gear up with your R2 Oxygen during intense exercise under extreme heat, whether on the trails, for a triathlon or