Pearl Izumi Women's Ultra 3-Quater Tight 100% Polyester Thermal Lite fabric provides superior moisture transfer and warmth Two angled back 3 oz. gel flask pockets (patent pending) Flattering wide waistband with flat stretch draw cord for superior comfort One zippered back pocket Fit note: Due to the extra support needed for the gel flask pockets, these tights fit snug. We recommend buying one size larger than normal in this style.