Heavyweight First Layer - Athletic Fit Weight - 8.0 oz 86% Acclimate Dry Polyester / 14% Spandex UPF (Sun Protection) Rating - 50+ 4-Way Stretch Fabric Technical Slick Outside Brushed Fleece Inside Superior Acclimate Dry Moisture-Wicking Intense Quick Drying Ag47 Anti-Microbial Protection Clean Seam Next-To-Skin Comfort Durable, Breathable & Won't Shrink 100% USA Made!!!