The athletic fit is great for layering, so you can wear the Core 3.0 Paneled Zip-Neck Long Underwear Top with all your favorite outfits! The Core 3.0 features a tech face finish made from 92% Polyester and 8% Spandex to get the perfect combination of stretch and synthetic properties. The inside is kissed with fleece for a next-to-skin softness, this feature adds a touch of quick dry and wicking abilities. Versatile and warm, the PolarMax Core 3.0 Paneled Zip-Neck Long Underwear Top was built for the winter season. 92% Acclimate Dry Polyester / 8% Spandex, Tech Face Finish / Kissed Fleece Next-To-Skin, Superior Acclimate Dry Moisture-Wicking, 100% Made in the USA, Fit: Tight, Material: Synthetic, Weight: Mid, Type: Top, Wicking Properties: Yes, Recommended Use: Snow, Antimicrobial: Yes, Anti Odor: Yes, Quick Drying: Yes, Moisture Wicking: Yes, Model Year: 2020, Product ID: 566323, Model Number: 3P31DPRP 701 XS, GTIN: 0785146596890