Formula Long Sleeve Men _tab_hestra-size-guide Made from Polartec Wind Pro

Made from Polartec Wind Pro Stretch and synthetic shearling

What makes it special

Tight Knit Construction: Windproof design for maximum warmth

endless possibilities

- Ultra lightweight

Formula Long Sleeve Men _tab_hestra-size-guide Made from Polartec Wind ProMilk casein fiber was used in many garments and household items in America and Europe during the 1930s and 40s. Its made using a process that is similar to rayon viscose (derived from wood pulp), but because its a regenerated protein fiber, it reacts like wool. Historically, it was used as a wool alternative, advantaging soldiers on the front lines in times of wool scarcity. However, it fell out of use after WWII ended and newer, cheaper synthetics