"Did you know? F1 racing suits must also have two large ‘handles’ on the driver’s shoulders. These straps must be capable of supporting the combined weight of the driver and his seat, which in the event of an accident can be removed from the car by marshals ‘as one’, in order to minimize the risk of complicating injuries."

More clothing specs: http://www.formula1.com/inside_f1/safety/helmets_hans_clothing/7436.html