The Progress MERINO outdoor socks are equipped with premium MULTITECH wool blend. MULTITECH is a noble blend with a high proportion of fine merino wool and functional polyamide with enhanced antibacterial effect. The sheep's wool fibre itself has antibacterial properties, but in the case of Multitech these effects are enhanced by the silver ions permanently stored in the polyamide fibres. The polyamide also strengthens the yarn's abrasion resistance and elasticity. Merino wool also provides excellent thermoregulating properties and keeps you warm even when wet.