Whether it is being used as a performance top in the summer or a base layer in the winter, we love the Outdoor Research Echo 1/4-Zip Jacket for it technical performance features. Made from a Bluesign APPROVED and recycled polyester, the Echo is moisture-wicking, quick-drying, breathable and lightweight. With a UPF rating of 20 you can have more fun staying out and adventuring, and the AirVent moisture management incorporated into the fabric helps to keep us dry by wicking away and evaporating our sweat. ActiveFresh odor control technology helps to reduce odor caused by sweat and the flat-seam construction makes this top very comfortable and easy to layer over.