• Wide 5mm wide adjustable strap with silicone lining for a more secure fit

And the fabric is Bluesign approved

BR 37 38 39 / 40 41 / 42 / 43 44 45  46 / EU 40 40

MS 245-305

on performance mid sock w Color:white ivory • Wide 5mm wide adjustableThe running sock that balances a feeling of protection and performance. Comfort that keeps you going. The Performance Mid Sock W from delivers superior cushioning with targeted support. It offers full arch and ankle support and is crafted from breathable performance fabric to keep you cool during long runs. The special blend provides a balance of protection and performance for athletes. Regular. True to size.