Mizuno Breath Thermo Women's Bio Leg Running Tights Two-way Brushed Stretch Fabric - Designed to fit anatomically onto your skin. Breath Thermo Plus - A unique type of insulation fabric which generates heat from absorption of moisture, especially useful for protecting the human body from cold temperatures. 4 Needle Flat Lock Stitching - To help minimise chaffing for a comfortable fit. Locking Reflective Leg Zipper - Keeping you visible in low light conditions as well as allowing you ventilation by unzipping the zip. D.F. Cut - For greater freedom of movement.