Designed to be worn with the Alpinestars’ range of off-road boots, the MX Plus Socks feature a single layer construction which incorporates Dryarn® fiber, mesh areas and rib construction for high levels of breathability and stretch to provide enhanced rider comfort, on and off the bike.. PrimaLoft® fiber for compact construction and fast drying. Moisture wicking construction throughout. Youth version also available. New modern graphic in line with MX24 color palette. Reinforced protective padding on the ankle.