Swiss-designed and made in Italy, these socks keep your feet comfy during wintry runs. - Extra padding in functional zones: heel, toes, toe tips, ankle - Your Achilles tendon is protected by the Lambertz-Nicholson Achilles Tendon Protector 4.0 - Activ Bund cuff for a solid grip without squeezing - Suppronation XX Cross Bandage supports a healthy foot position - Air-Conditioning Channel 4.0: great ventilation - Iso-Blocker works against cold bridges and reduces pressure points - 51% polyamide, 34% Merino wool, 11% polypropylene, 4% elastane - Traverse Air Flow System - 2 year guarantee against flaws in material and manufacturing