Lightweight outdoor socks with a zipper, perfect for hiking and camping. They are really warm when worn indoors. You might even feel hot. - Color: Blue - Design: Zippered, with a drawstring closure at the opening - Usage: For outdoor activities, especially suitable for hiking and camping - Features: Lightweight and can be stored compactly - Material: Appears to be nylon or polyester Thank you for viewing. Features... Waterproof, Windproof, Insulation/Cold Protection