Smartwool Merino 150 BeanieOne Size - Black Smartwool Merino 150 Beanie - in stock now. The Smartwool Merino 150 Beanie is a lightweight, low-profile cap for any cool to cold weather activity. The soft fabric Features a nylon core for added durability while enjoying the natural quick-drying, moisture wicking and antimicrobial properties of merino wool. Products on Sale Are Discontinued Styles or Colors. Features of the Smartwool Merino 150 Beanie Flatlock seam construction designed to eliminate chafing Jersey knit Knit in Vietnam: 87% Merino Wool, 13% Nylon Core Core spun: Merino fibers wrapped around a nylon core.