Did you know that, according to the National Safety Council (NSC), seat belts reduce critical crash injuries by as much as 50%, and 75,000 people over the course of four years, or from 2004 to 2008, owe their lives to seat belts? Very few people give much thought to life-saving cam buckles and related restraints. What materials make up the seat belts, straps, rope, and cordage we rely on everyday?

Nylon Webbing and Cam Buckles

As of 2009, 88% of Americans regularly wore seat belts, and seat belt use remains mandatory in 49 U.S. states and in the District of Columbia (the only exception being New Hampshire), according to the NSC. Most of today’s seat belts are made from a few, durable materials, including nylon webbing and cam buckles.

Seat belt nylon is relatively thin (to keep drivers and passengers comfortable), and it can withstand high temperatures, heavy weights, and a considerable amount of pressure. The same webbing may also be used for runners, harnesses, slings, and anchor extensions. Polypropylene, a strong and widespread plastic in the U.S., may also be used for seat belt straps. Polypropylene ropes are also considerably popular, largely because the material stays above water.

Cam Buckles, on the other hand, come in a number of different sizes and styles, and can be made from plastic or metal. Stainless steel, steel, and plastic cam buckles are known for their secure, slip-free locking mechanisms. D-rings are similar, yet simple, mechanisms. D-rings can be made from stainless steel, plastic, brass, and nylon. Nylon D-rings can be especially durable, and even prevent rust build-up. Although D-rings are often paired up with the same materials, such as nylon and polypropylene webbing, they are typically used to support light-weight items, like backpacks and camping gear.

Seat belts save lives. Manufacturers can equip vehicles with secure, and strong, nylon webbing, and keep restraints in place with dependable cam buckles.