Lightweight Thermal Set Of Both A Thermal Top And Bottom. They are Made Of Premium Fabric, Thermals For Men Have Smart Odor Control To Prevent The Spread Of Smells. You Can Remain Confident That Wearing These All Day Won't Cause Any Problems. For Even More Added Comfort, Long Johns For Men Thermal Have No Tags, Which Reduces Any Skin Irritation. You Can Slip Them On And Off Easily And Can Be Worn Under Your Clothes For Added Insulation And At The Gym For Added Support And Movement. They are Regular-Fit Design & Pull On Closure. They are made up of Materials: 60% Cotton & 40% Polyester. Care Instructions: Machine Washable