What must Kapok life preservers contain to meet safety standards?

Kapok life preservers must contain vinyl-covered pad inserts to meet safety standards. The use of vinyl-covered padding is crucial for ensuring the durability and effectiveness of the life preservers. The vinyl covering protects the kapok filling from water and abrasion, enhancing the preservers’ buoyancy and overall lifespan.

Kapok itself is a natural fiber that provides excellent buoyancy properties, but without the protective vinyl covering, the integrity and functionality of the life preserver would be compromised. This means that it would not perform well in real-life rescue situations or provide adequate safety for users in the water. The incorporation of vinyl also aids in meeting regulatory standards set forth by safety authorities.

The other options offered different forms of padding or buoyancy systems that do not align with the specific requirements for kapok life preservers, which emphasizes the need for the vinyl covering as a standard component for safety compliance.