Lululemon Swiftly Tech - size 4, great condition. A high-performing top that adapts seamlessly to every way you like to sweat. Constructed with fewer seams, so you can skip the chafe. Run, lift, sweat—lightweight fabric won't hold you back. Silver threads reduce odour-causing bacteria between washes. 50% Nylon, 44% Recycled polyester, 3% Elastane, 3% X-static® nylon