Indera - Mens Long Sleeve Thermal Top, 800LS SHRINKAGE CONTROL FABRIC - 65% Cotton 35% Polyester - Thermals knit traps and retains body heat for warmth RELIABILITY IS WHAT YOU WANT - On a colder day when you are headed out for a walk or hike put on these thermals for that extra protection from the cold! HIGH QUALITY CONSTRUCTION LONG JOHN UNDERWEAR with exceptional value is what you get from Indera. FULL CUT FOR A COMFORTABLE FIT - Chest Size S = 34-36 M = 38-40 L = 42-44 XL = 46-48 2XL = 50-52 3XL = 54-56 4XL = 58-60 5XL = 62-64 6XL = 66-68 NO QUESTIONS ASKED 30-DAY GUARANTEE: If you aren't completely satisfied when you receive these thermals, then simply send them back to us for a full refund. As long as the thermals are unworn, we'll be happy to refund you with no questions asked.