Fast 3.0 Singlet Women Size:XS The central protective insert is

The central protective insert is purposely padded with high-density foam to provide maximum comfort for long-distance rides

We recommend going up one size if you are in doubt

and YKK zipper at the back with a soft protective placket behind for comfort and protection

It sits loosely on the body and is therefore perfect for mountain biking

Fast 3.0 Singlet Women Size:XS The central protective insert isFast 3. 0 singlet is an upgraded version that feels very comfortable. The extremely light singlet fits perfectly over your shoulders and dries quickly. It's made of comfortable and moisture transporting materials. The back is made of breathable mesh to ensure extra ventilation and excellent transportation of sweat, which makes the singlet even more comfortable to wear. We have given this singlet an upgraded look with slimmer shoulder straps, as well