The On Performance-T is Swiss engineered to support running of the highest level. It features a blend of high-tech fabrics in a stripped-down design for extreme lightness, and all seams are taped, not stitched, so it feels like you're wearing nothing at all. The tear-proof front is engineered to shield, dry and protect, while the back features a highly breathable, moisture-controlling mesh fabric for a refreshing flow of air and running unrestrained. The protection you need, in a style everybody will want.