Uniqlo's Ultra Stretch Smooth Set Up. I am selling it because I no longer wear it. No signs of wear or smell. I think you can wear it except in midsummer and midwinter. Size: M Color: Navy Specifications: Waist: Full elastic (non-adjustable) with inner drawstring - Sheer: None - Bottoms fit: Regular - Pants silhouette: Straight - Pockets: Yes