Thanks to the unique Stretchdry fabric, the walking thin mid socks are 100% waterproof, windproof and breathable; perfect for days where minimum insulation and maximum protection is required.  The merino wool lining creates a moisture control and adds comfort to ensure that your feet are always snug, its flat seam and hand linked toe closure also prevents rubbing \' giving you superior comfort and protection.100% waterproof, windproof and breathableLightweightMoisture controlAdded supportSecure comfortable fitRubbing preventionMid lengthThermal rating 2