Free Fly's Flex fabric might be from the future. With a luxe, weighty drape, mind-blowing softness, and a laundry list of performance benefits like temperature regulation, UPF 50, and four-way stretch? Yeah, definitely from the future. The Bamboo Flex Long Sleeve Henley is a fresh take on the casual, cool-weather staple. It's perfect everyday fall shirt, or use it as a base layer when temps drop. For more laidback days and travel, opt for a jogger-henley combo.