The original AireatorR is built by cyclists for cyclists. Born in 1992, the AireatorR is the first product that launched DeFeetR and today its still the workhorse of the DeFeetR line. The AireatorR is the undisputed, original airflow design and first sock with a open mesh weave instep hence the name. It was also the first design sock that was customized with a logo, colors, and text. Before the AireatorR, that simply wasn't done. It has been worn to victory in nearly every International cycle race. The AireatorR still leads in lightweight, durability, moisture wicking and air permeability. The Spotty features a 4 single layer cuff with a fresh palette of hi vis colors. More than just a sock, Spotty boasts a real passion for style and performance. Made from COOLMAXR EcoMade, the eco friendly polyester that comes from recycled plastic bottles. Sizing: Small Women 6 8 Medium Men 7 9 Women 8.5 10.5 Large Men 9.5 11.5 Women 11 13 Extra Large Men 12.