evo.com | BlackStrap Balaclavas > The BlackStrap Merino Single Layer Tube is a wool-blend gaiter that has superior thermoregularity on cold or extra sweaty days. 53% Merino / 38% Polyester / 9% Polyamide Wicks Sweat, Dries Fast Keeps moisture off your skin and evaporates quickly when the effort ramps up. One Size Fits Most Naturally Odor-Free Merino wool fights funk so you can wear it longer between washes. Head Circumference 21" - 23.75" | BlackStrap Single Layer Tube 2026 | Wool/Polyester