THERE IS A MUCH GREATER RISK OF ENTRAPMENT AND INJURY/DEATH WHEN USING BED RAILS WITH A SOFT MATTRESS! A soft mattress increases the risk that a person’s head, arm, or leg could become entrapped between the mattress and a rail. Entrapment can cause injury or death. To ensure it is safe to use a bed rail with your mattress, test your mattress by taking your fist and applying about 12lbs (5.4kg) of weight on the edge of the mattress. If the mattress is soft enough that you can compress the mattress by about 2 inches (51cm) when applying 12 lbs (5.4 kg) of weight, do not use a bed rail without the bed rail safety guard. If you have any questions, please call 800-506-9901.