Uniqlo Heattech Warm Easy Pants Size M Black Item No. 321-418930 The purchase date and number of times worn are unknown. I don't see any stains, but please forgive me if I missed anything. Thank you for viewing. Since I'm covering the shipping cost, I will compress the item as much as possible and ship it using the most affordable method. Please purchase only if you understand that this is a used item. Thank you.