For those who want the lightest running sock but still want a super-fine Merino wool, the Ultra-light Fits the bill. Nothing but protection between you and your running shoes.
| Sizing Reference | |
| Men's | |
| S | 3.5-5.5 |
| M | 6-8 |
| L | 8.5-10 |
| XL | 10.5-12.5 |
| XXL | 13.15.5 |
| Women's | |
| S | 5-7 |
| M | 7.5-9.5 |
| L | 10-11.5 |
| XL | 12-14 |
| XXL | 14.5-16.5 |