First Lite's Late Season Over the Calf Merino Socks are Made-In-USA and built for maximum warmth. Whether you're busting ice to open up the duck hole or waiting out a late season whitetail, these heavyweight merino wool socks are designed to help you stay longer in frigid conditions. FeaturesHeavyweight loft and cushioning throughout the entire sockLycra fit panel on top of footSeamless construction for enhanced comfort and durability