WZY&JYM Men's Sports Compression Leggings 90% polyester, 10% spandex. Elastic Waistband - This provides a snug and athletic fit. Compression Fit - For an ultra-tight, locked-in feel. Keeping your blood flowing in the correct areas for improved efficiency. 4-way stretch fabrication allows greater mobility in any direction. Moisture Transport System wicks sweat & dries fast. Refelctive logos and elements for better protection.