Seaslskinz waterproof design gets a thermal boost for the winter season the trek mid length sock is constructed from sealskinzs stretchdry technology and is woven from thicker merino than lighter models making it an essential item for long distance trekking in cold weather conditionsactivitysnowsportscolour swatchdark greencushioningfully cushionedgendermensbrandsealskinzcolourgreencuff detailselasticated cuff