The ScentBlocker Men's Koretec Polar Weight Scent Control Base Layer Long Sleeve Shirt is your go to, hardworking first layer. ScentBlocker's exclusive S3 technology helps keep stink down while keeping you warm, without breaking the bank.Features:S3 Silver Antimicrobial Technology For Odor PreventionFleece Fabric Keeps You Warm When The Temperature DropsSet-In Sleeves For Flexibility In The FieldFlatlock Seams to Ensure All Day Comfort