As the ONLY crash-tested pregnancy seat belt adjuster that actually protects baby in the event of a crash, the Tummy Shield: has a patented design that redirects the seat belt away from the pregnant belly, securing the seat belt at the leg, not the across the low belly where it can injure your unborn baby is constructed of a stainless steel plate and anchor that attaches securely to the car seat and holds the seat belt firmly in place, without dangerous slippage or excessive slack was successfully crash tested showing the seat belt continues to comply with current safety standards was engineered to be at least as strong as the seat belt. A little piece of insurance and a lot of peace of mind!