A versatile sock, with exceptional temperature regulation, the Sealskinz Waterproof Cold Weather Mid Length Sock is fully waterproof with a merino wool lining to wick moisture and add comfort. A four-way stretch fit and flat toe seams prevent rubbing and ensure full mobility, taking care of your feet on any terrain.Fully waterproof socks from SealskinzWaterproof \' three-layer construction, adding warmth and durabilityMerino wool lining - controls moisture and is insulatingZonal elasticationFour way stretch fit \' for 100% mobilityFlat toe seams \' prevents rubbingFootbed padding \' absorbs shock and reduces pressureRecommended activity \' trail running / hiking