Synthetic Round Slings are typically made from which material?

• A. Nylon
• B. Polyester
• C. Kevlar
• D. Fiberglass

Answer: (B)

The material used for synthetic round slings is chosen for how it behaves under load. Polyester is typically used because it offers a strong, durable fiber with relatively low stretch, which means lifts stay more controlled and the sling retains its rated capacity better during dynamic loading. It also resists abrasion well and doesn’t absorb much moisture, so performance stays consistent in wet or outdoor conditions. This combination makes polyester a reliable, everyday choice for round slings.

Nylon, while strong, stretches more under load and absorbs water, which can change its performance during a lift. Kevlar (an aramid) and fiberglass have properties that aren’t as well suited for the bend-and-wrap geometry of round slings, either due to cost, stiffness, or other practical limitations, so they aren’t the typical material used.