| Stocking size | US/CA shoe size | EU Shoe Size | UK shoe size | Calf circumference (at widest) |
| S | 3-5.5 | 34-37 | 2-4.5 | 11"-14.5" (18-26.5 cm) |
| M | 6-8.5 | 38-41 | 5-7.5 | 12.5"-16.5" (32-41 cm) |
| L | 9-11.5 | 42-45 | 8-10.5 | 14.5"-18" (37-45.5 cm) |
| XL | 12-14.5 | 46-49 | 11-13.5 | 16"-23" (41-58 cm) |
| Stocking size | US/CA shoe size | EU Shoe Size | UK shoe size | Calf circumference (at widest) |
| S | 3-5.5 | 34-37 | 2-4.5 | 11"-14.5" (18-26.5 cm) |
| M | 6-8.5 | 38-41 | 5-7.5 | 12.5"-16.5" (32-41 cm) |
| L | 9-11.5 | 42-45 | 8-10.5 | 14.5"-18" (37-45.5 cm) |
| XL | 12-14.5 | 46-49 | 11-13.5 | 16"-23" (41-58 cm) |
The Smartwool Performance Zero Cushion running sock features Indestructawool technology for added durability. Its 4 Degree Elite Fit design offers a customized performance-oriented fit. Shred Shield technology reduces wear in the toe box. Mesh areas enhance the sock's breathability. Virtually Seamless toe offers comfort. Heel tab prevents the sock from sliding around in the shoe.
Fabric: 45% merino wool, 50% nylon, 5% elastane.
