Helmet, comprising a helmet shell and a strap system

A helmet, comprising:

• a helmet shell;
• and
• a strap system,
• wherein the strap system comprises a chin strap with a chin rest element,
• a left end of the chin strap is connected to a front left tensioning strap and to a rear left tensioning strap and a right end of the chin strap is connected to a front right tensioning strap and to a rear right tensioning strap,
• the front left tensioning strap and the front right tensioning strap are in each case coupled to a front half of the helmet shell,
• the rear left tensioning strap and the rear right tensioning strap are in each case coupled to a rear head contact body, and
• the rear head contact body is coupled to the helmet shell above the rear head contact body on a left-hand side of the helmet by a strip-shaped, stiffened left rear head brace and on a right-hand side of the helmet by a strip-shaped, stiffened right rear head brace.