ORTOVOX Knee-high socks for cross-country skiing

This legendary German company named Ortovox has been specializing in challenging mountain activities since 1980. They became popular, thanks to their avalanche transceiver ORTOVOX F2. It had a double frequency transceiver for searching avalanche victims. Except for safety systems and finders, they also offer apparel, backpacks, shovels, probes, and other freeride and alpine equipment.