These are Uniqlo kids' warm pants. The outside is a smooth polyester material, and the lining is fleece, making them warm and useful. - Size: 110 - Color: Gray - Design: Elastic waistband, ribbed cuffs - Material: Fleece lining They show some signs of wear, but haven't been worn many times, so I think they can still be worn. We do not have any pets, and we do not smoke. Thank you for looking.