Our Vertex Micro Crew is one of the lightest crew socks on the planet. Itâs an insanely stripped down running sock that still delivers the perfect amount of cushioning along the bottom of the foot. Lose the weight without sacrificing comfort. True Seamless construction reduces hotspots and blisters. Ultra high stitch count creates a super comfortable sock with a streamlined fit like no other. No slipping, no bunching, no blisters. Fine gauge Merino Wool makes this a fast drying and breathable âall weatherâ sock that stays cool in the summer and warm in the winter. And since Merino Wool is naturally antimicrobial this sock repels bacteria and odor when youâre laying down the miles. Still made in Vermont. Guaranteed for life.