The design of this hat is simple yet timeless. Although known as a runners "Beanie", the style is popular across a variety of outdoor adventures. Many are sold at marathon events, as well as to layer under helmets for biking or skiing. It is available unlined or fleece lined. Great for fall walks, vigorous winter activity, or even a dash to the grocery store. These hats are lightweight and warm, practical and fun. One size fits most due to the inherent stretch of the fabric, you will find different patterns for men, women and children of all ages!