The Original One Piece Union Suit. Full Length 9 Button Placket Front. Cold Weather Comfort Thermal. Long Sleeves. Reinforced Collarette, Rib Knit Cuffs and Ankles To Retain Snug-Fitting Shape To Seal In Body Heat. Reinforced Shoulder Seams For Longer Wear, Extra Strength and Durability. Wide Overlap, 1 Button Seat. Vertical Rear Seat Flap. Double Thick Cuffs.