Prevent hot heat waves from making direct contact with your skin or face with our range of straw hats, lifeguard hats, etc. New Era sells and markets a wide range of baseball caps, beanies, winter hats, etc., in the US for everyone. The brand’s headgear is stylish, cool, and highly functional as it is made using the best quality raw materials. Olive is a dark yellowish-green color favored by most fashionistas. Durable or fancy? Look or feel? What you want in your New Era Olive Hats & Caps for men depends on materials like Cotton, Nylon, Polyester and Acrylic.