The perfect 2 pack features the Montrose and the Ziggy. Both socks have spandex throughout the sock, turn welt top, waffle stitch breather panel, reinforced Hi-heel, arch support and a flat toe seam. The Montrose is made of 65% Merino Wool, 31% Stretch Nylon and 4% Spandex. The Ziggy is made of 60% Merino Wool, 35% Stretch Nylon and 5% Spandex.Goodhew socks are all crafted in the USA and are machine washer and dryer friendly.