Gore Running Wear Women's Essential 2.0 Lady Tights 91% NYLON, 9% ELASTANE, MESH: 80% NYLON, 20% ELASTANE Imported Ventilation and protection. These tights keep you warm on cool and dry days. Mesh-inserts provide ventilation. Ideal for the seasonal transition. Tight fit Concealed back zip pocket Zipper with semi-lock slider and reflective print on lateral hem Mesh insert in back for optimum ventilation Mesh insert in knee bend for optimum ventilation Adjustable elastic waistband with flat cord