The PolarMax Micro H2 Crew Long Underwear Top is a casual base layer for everyday wear. Constructed with 100% AcclimateDry Polyester, you'll stay dry and comfortable the entire time you're wearing it. The relaxed fit is nice when you're simply hanging out around the town or simply don't like a compression feel while out on the mountain. This long underwear top also features AcclimateFresh Technology, making it anti-odor and anti-microbial keeping you smelling and feeling good. The PolarMax H2 Crew Long Underwear Top is perfect for all seasons use, year round. 100% Acclimate Dry Polyester, Weight: 5oz., Relaxed Fit, AcclimateFresh- Anti-Odor and Anti-Microbial Properties, Comfortable Flat Seams, 100% Made in the USA, Fit: Loose, Material: Synthetic, Weight: Light, Type: Top, Wicking Properties: Yes, Recommended Use: Snow, Antimicrobial: Yes, Anti Odor: Yes, Quick Drying: Yes, Moisture Wicking: Yes, Model Year: 2018, Product ID: 566013, Model Number: 2H11ACS 621 M, GTIN: 0785146541234