Simms Mid Calf Liner Sock Slip into the lightweight, moisture-wicking sock liner that's perfect for summer wet-wading or layering with standard socks for extra warmth on chilly days. - The body, heel, and toe boxes are knitted with a polypro yarn that wicks moisture and is highly breathable - Nylon yarns are knitted into high-wear areas for enhanced durability - Mid-calf height - Made in the USA FABRIC TECH: 64% Polypropylene, 33% nylon, 3% Lycra Spandex ITEM #: PG-14088