Physician's Choice Diabetic Socks in Size 13-15 and the color Heather Grey are an excellent choice for those needing a King Size sock that also accomodates moderate swelling in the feel and ankles.  The Grey color choice is a great athletic sock that reduces moisture and friction within the shoe to provide lasting comfort, which can be credited to the socks' unique weave and 80% Cotton, 20% Nylon fiber content.  Try a dozen today, and experience the comfort of Physician's Choice Diabetic Socks in Grey.