Nike Running Division 5″ Zip Pocket Brief-Lined Shorts. 100% Authentic from NIKE or Your Money Back. Ergonomic brief liner feels soft and supportive. Machine wash. Final Sale. Body: 100% polyester; Panels: 94% polyester/6% spandex; Waistband: 66% nylon/34% spandex; Lining: 89% polyester/11% spandex.