The warmest pants I have ever known. Thick, wind proof fleece. I am on the large size of medium, these run slightly small or maybe it’s that I am not used to the thickness of them. Worn only once. They deserve to live outside!! Perfect condition. From the website: Like your favorite blanket, with the added benefit of being able to wear them outside the house. Our Fleece Pants are about as close to hibernating as we can get. The material is thick, warm and reinforced where you need it most. Zippered hand pockets and a back pocket keep your small gear secure while a custom logo snap pocket is great for easily accessing a bandana or snack. Cinch cords at the hem provide flexibility. Relaxed fit 100% recycled polyester Polartec® 200 fleece Reinforced knee patches and seat