Our Merino wool socks allow you to not only survive during the winter, but thrive! We have been designing tabi sandal socks for 5 year now and we are quite excited about the developments we have come up with to make these wool tabi socks even better! The midweight Merino wool blend offers superior thermo-regulating properties without sacrificing performance. Black and charcoal grey wool tabi socks fiber composition:53% Cruelty-Free Merino Wool30% Nylon12% Acrylic5% Lycra Spandex Brown wool tabi socks fiber composition:30% Merino Wool (RWS Cruelty free)25% Acrylic42% Nylon3% Lycra Spandex If it's dry, our wool blend tabi socks can keep your feet comfortable down to well below freezing. Care: Machine wash gentle. Hang dry. *Note: Color variation in reinforced areas (toes, ankle) is normal. **Please note, opened socks are non-refundable (no one wants used socks!). Sizing USA UK EUR SOCK SIZE 4M 6W 3 36 SMALL 4.5M 6.5W 3.5 36 5M 7W 4 37 5.5M 7.5W 4.5 37.5 6M 8W 5 38 6.5M 8.5W 5.5 39 7M 9W 6 39 7.5M 9.5W 6.5 40 8M 10W 7 41 MEDIUM 8.5M 10.5W 7.5 41 9M 11W 8 42 9.5M 11.5W 8.5 43 10M 12W 9 43 10.5M 12.5W 9.5 44 11M 13W 10 44.5 LARGE 11.5M 13.5W 10.5 45 12M 14W 11 46 12.5M 14.5W 11.5 46 13M 15W 12 47