Boulder Fleece A classic Obermeyer fleece, seven decades in the making. For seven decades, Obermeyer has been perfecting the art of the fleece. Today, we're happy to offer The Boulder Fleece, a true Obermeyer classic and fan-favorite. As part of our Heritage collection, the Boulder Fleece pays homage to our decades of experience, with its unique blend of vintage styling and modern design. We've designed the M Boulder with double-sided brushed fleece, a snap-closure mock neck, and handwarmer pockets to update this classic Obermeyer staple.