NEW WITHOUT TAGS! Lululemon Swiftly Tech Short-Sleeve Shirt 2.0 Race Length In Slate/White. Size 8. Minimal seams to reduce chafe. Lightweight. Mesh construction for breathability Added elastane improves stretch and shape retention. All: 54% Nylon, 40% Recycled polyester, 3% Elastane, 3% X-static® nylon. Silverescent™ technology, powered by X-STATIC®, inhibits the growth of odour-causing bacteria on the fabric. Slim fit, race length.