From Trimtex:
"The Run singlet is a great running singlet. The singlet is light and comfortable to wear, and is made in a breathable material that has good moisture transfer. In addition, it has mesh panels at the sides for extra ventilation. The singlet is well suited for all types of training and competitions, such as running, kayaking, paddling, crossfit and other training activities.
This product has a tight fit. It will fit close to body, but not cling to it necessarily. There is freedom of movement and is a product that will fit most people."