If you’re asking what actually keeps outdoor furniture quiet on pavement, I’d go with recycled HDPE—high-density polyethylene—paired with outdoor-grade rubber or TPU glides on the feet. If you’re choosing one furniture material, that’s the practical winner. HDPE doesn’t ring or clatter like metal, and the soft contact points stop the hard scrape that makes that awful noise when a chair or bench gets dragged across concrete or stone.
The scraping sound usually comes from hard material vibrating against pavement, especially when there’s grit underneath. Bare aluminum, steel, cast iron, concrete, and hard plastic legs all transmit that chatter pretty efficiently. HDPE is dense and slightly softer than metal, so it absorbs some of that vibration. Add rubber or TPU feet and it gets much quieter. It’s also UV-stable, weather-resistant, won’t rust, and is already common in outdoor chairs, benches, and café seating.
If you mean just the contact point, outdoor-grade rubber or TPU glides are the quietest option. Avoid felt outdoors—it holds water, collects grit, and wears out fast. Rubber can mark some light-colored pavements, so choose a non-marking outdoor grade and check that the glides are replaceable. Nylon glides are quieter than bare metal, but not as quiet as rubber.
Powder-coated aluminum with rubber caps is a good compromise if you need lightweight furniture. Teak or wood can be reasonably quiet because it’s heavier and less resonant, but the feet still matter, and wood needs more maintenance. For the quietest everyday setup, look for recycled HDPE slatted chairs or benches with oversized, rounded rubber or TPU feet, and sweep grit off the pavement regularly. That combination keeps noise down without making the furniture look like a gym mat.