This Thermasilk Long-Sleeve Scoop Neck Shirt is made from 100% pure filament pointelle silk fabric, the perfect combination of luxurious feel, durability, and weight. Warm and super soft, but extremely lightweight, this 75g knit silk fabric has the highest ratio of warmth to weight of any fiber, natural or synthetic, making the Thermasilk Shirt a great base layer. ec2 Qwik-Dri Thermoregulation Comfort Technology keeps you dry by accelerating sweat evaporation, while the antimicrobial fabric resist odor. All natural insulator is sustainable and renewable. Machine washable and dryable. Highly packable for easy travel. UPF rating 15+. Long-Sleeve Shirt has a scoop neck with scalloped edge, set-in sleeves, and ribbed cuffs. Natural.