The Radium Curv 13 Select is by far the lightest and most durable hardshell harness on the market featuring ION's revolutionary thermo composite CURV material. Thanks to high-end add-ons like the C_Bar 3.0, the Select level stands out from the crowd. With a flex index of 13, all loads are distributed perfectly through its stiff 3D pre-shaped center part. Together with the high outline, this medium stiff to stiff harness offers all the comfort any dedicated windsurfers could wish for. Flexible side parts allow the rider to move and twist freely. Additionally, inside EVA avoids friction with the harness while water-repellent Hyper_foam contributes to outstanding performance for extra-long water action.