Lightweight merino wool is famous for being breathable, temperature-regulating, and moisture-wicking, making it an excellent base layer in a variety of conditions. With merino wool being 80% of the Code of Silence Men's FareWinds 160 Long Sleeve Crew Neck Base Layer Shirt, it makes the shirt ideal for year-round clothing and activewear, offering odor resistance, durability, and comfort without itching. FeaturesMerino base shell fabricPaneled sleeves2-pc. stretch sleeve cuffs with thumbholesElastic gripper tape on back hem160gsm merinoLRMaterials: 80% merino wool, 20% polyester