The NEW Wooleator Pro features a flat toe seam and additional lycra throughout the sock, providing a closer fit. Like the original Wooleator, the Pro is a thin, low-bulk sock in USA Merino wool. The Wooleator Wool Blend versions also include Repreve performance fiber, moisture-resistant and naturally antibacterial. The Wooleator Pro is equally comfortable for 4-season cycling or casual wear. - No padding / 4-season / Wool - Navy Heather Content: 56% Merino Wool, 43% Nylon, 1% Lyra - Gravel Grey, Lead, Petrol , Natural Content: 42% Nylon, 28% Recycled Polyester, 28% Merino Wool, 2% Lycra - Care: Machine wash cool. Tumble dry low or hang dry. No bleach, softeners, or harsh detergents.