With zipper - luckily

The top has a good fit is well made, and the Hüftbündchen it is equipped with a kind of silicone strips to prevent slipping.
Fortunately, the top has a zipper, without this the neck while running would be too tight, as a warm underwear you can close the shutter kommplett and then does not interfere.
The zipper is relined or deposited, that is behind the teeth still a piece of cloth, so that the shutter does not rest directly on the skin.
Only alternative colors (striking, as protection in road transport) and reflective strips incorporated could improve the shell.