Which kind of two-layer system
| Brand | What the maker prints | Models here |
|---|---|---|
| Icebreaker | Liner to wear under another sock | 2 |
| Injinji | Liner to wear under another sock | 3 |
| Injinji | Separate liner + outer | 2 |
| Minus33 | Liner to wear under another sock | 4 |
| Smartwool | Liner to wear under another sock | 1 |
| Wigwam | Built-in double layer | 4 |
| Wigwam | Liner to wear under another sock | 2 |
| Wrightsock | Built-in double layer | 19 |
Two layers take more room than one. Try the whole system in your shoes before a long walk.
Before you buy
Every brand prints its own size chart, and a medium at one maker is not a medium at another. Open the size chart for the brand you choose, or use the size finder with the exact model. Then check the heel, toes and cuff in your own shoes with the fit checklist.
Washing settings differ by maker too: the care lookup gives each model’s own instruction.