18. MSRP$78 Lululemon Swiftly Tech Long Sleeve Crew size 4

We designed this anti-stink, long-sleeve layer with running (and sweating) in mind. silverescent® technology Silverescent® technology, powered by X-STATIC®, inhibits the growth of odour-causing bacteria on this garment anti-stink features Designed for: Run Ventilation: Engineered Mesh is placed in high-sweat areas Thumbholes: Help keep your sleeves in place and hands warm Seamless construction: Reduces bulk to help prevent chafing Slim fit: Fits close to the body Tiny hole in the armpit