The REI Co-op Running 1/4 Zip Pullover in Men's size M is a versatile and comfortable option for outdoor activities like hiking and camping. Made from a breathable polyester fabric, this pullover features a stand-up collar, thumb hole sleeves, and a convenient 1/4 zip closure for easy layering. With a solid gray color and a logo accent, this pullover is both stylish and functional for all seasons, making it a great addition to any activewear wardrobe.