Our new GridFleece Half-Zip was engineered to breathe in motion and insulate at rest. It’s a lightweight technical layer cut from Coolcore® fleece, an advanced textile with a grid-textured face that traps in heat while pushing moisture away from the body. Unlike traditional performance fabrics that often rely on mineral or chemical applications, Coolcore® delivers reliable moisture control and temperature regulation at the yarn level. This is achieved through a proprietary fiber geometry, which, much like our team behind Proof, is inspired by nature.