The SCHROTH asm system offers a unique safety advantage for 4-point harnesses. asm is the acronym for anti submarining. The risk to submarine (sliding underneath the lap belt), a well known phenomenon during frontal impacts, is significantly reduced by the asm safety system. The energy converter is located in the inboard shoulder belt. Therefore make sure you purchase left and/or right harnesses.
Severe injuries or death are possible using 4-point harnesses without the SCHROTH asm safety system or an anti-sub strap.
SCHROTH harnesses designed for use on public roads (FE push button models) or those likely to be used as 4-points come with the asm safety system. The performance of the SCHROTH asm safety system has also been positively tested in conjunction with airbags.
Racing harnesses without asm must be worn with an anti-sub strap!