Lululemon Push Your Pace White Vest, Size 6 Warm up and race on. We filled this vest with lightweight PrimaLoft® insulation so you can power through cool-weather runs. • Slim fit skims your body • High-low hem is hip length in front and cropped in the back • Zippered exterior pockets with a hidden phone sleeve • Reflective details • Side panels: 82% Nylon, 18% Lycra® elastane • Filling: 100% Polyester • Body: 91% Nylon, 9% Elastane