The Wooleator is a thin, merino wool version of the original favorite Aireator. Available in a 3" cuff. - Content: 61% Merino Wool, 37% Nylon, 2% Lycra - Weight: 1.6oz / 0.1lb - Care: Machine wash cool. Tumble dry low or hang dry. No bleach, softeners, or harsh detergents.