From Trimtex:
"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 as a thicker cross on the back. This provides optimal movement while the singlet stays in place during high-intensity workouts. The singlet is very well suited for all kinds of workout and competitions, like running, climbing, cross fit and other athletic activities.
This singlet ensures great movement and fits most people. It also has a tight fit, which means it sits quite close to the body."