Truly the only vest you need. This is why: first of all, it's reversible. One side is made with a technical ripstop fabric, which protects you from wind, rain, and tearing your vest. The other side is made with Sherpa, which protects you from cold and from sheep, because they'll think you're one of them. This is made with two fabrics that are sewn together on the edges and quilted with 100% polyfill. On one side: poly ripstop fabric which is designed to resist any tearing. It's also been treated with a Durable Water Resistant finish so it's waterproof. On the other side: Sherpa, which adds warmth and comfort. Alex, who starts every day with yoga and a pitaya bowl (you can Google it...we had to), is 6'1 and wears a Medium.