evo.com | Lenz Ski Socks > Poor circulation might sound like a minor issue, but for many, it's the nemesis keeping them from full immersion in buttery back bowls. The Lenz Heat 5.1 Socks are the answer, delivering constant heat to maintain warmth circulation and throughout the day. The shin protector, compression tech, and moisture transfer material create a compact design that's made to help you keep up with your winter passions. Please note: battery packs are sold separately. Over-the-Calf Integrated Shin Protector 30% Polyester / 25% Wool (Merino) / 20% Polyamide / 15% Polyacrylic / 5% Silk / 5% Spandex Manual Operation on the Battery or With the Free Smartphone App Battery Packs Sold Separately | Lenz Heat 5.1 Socks 2026 - Medium | Spandex/Acrylic/Wool