Lululemon Essential Tank Heathered Black 

Flow through your practice in this lightweight, anti-stink tank. The loose fit allows for easy layering over any bra. Seriously Light™ Luon Our sweat-wicking, four-way stretch Seriously Light™ Luon fabric makes moving a breeze seriously lightweight sweat-wicking four-way stretch cottony-soft Features Designed for: Yoga Lycra®: Added Lycra® fibre for shape retention Mobility : Racerback cut for full range of movement Silverescent® technology: Powered by X-STATIC®, it inhibits the growth of odour-causing bacteria on the garment Loose fit: Perfect for easy layering no size dot or tag but pit to pit is 16.5" therefore a size 10 based on Lululemon size chart