Nike. Mostly cotton. Worn a few times/ look brand new! Size Medium but could fit a small. “Black/White Leggings Tight fit for a body-hugging feel Swoosh design on left calf 61% cotton/33% polyester/6% spandex Machine wash SKU: CJ1984-010 Slip into high-waisted coverage with the Nike Sportswear Club Leggings. Featuring a bold Swoosh design and a waistband with a repeating pattern, they're crafted for all-day comfort.”