Sugoi Women&#39;s MidZero Tight (Black, Medium) 88% Polyester/12% Spandex MidZero Fabric - Provides full motion stretch and warmth. One Zip Back Pocket - Allows for storage of key essential items. Customised Fit - Stretch drawing with elasticated waist for a personalised fit. Reflective Elements - Help to keep you visible in low light conditions. Fabric - MidZero