This is a tank top with an attached bra by Lululemon. It has a mesh racer back. All ventilation all the time—this lightweight tank with built-in bra was designed for your sweatiest workouts. Light Luxtreme®. Sweat-wicking Light Luxtreme® fabric body is four-way stretch and feels cool, sweat-wicking, four-way stretch fits like a second skin cool smooth handfeel lightweight Mesh Mesh fabric panels help keep you cool breathable lightweight It is a size 4. Measurements are approximate. ▪️Armpit To Armpit: 
14" ▪️Length: 23" ▪️Condition: It is in preowned condition. Color has greyed over the years but no visible flaws. ▪️Items come from a smoke free Cat friendly home. ▪️All pre-worn clothing has been washed & steamed. ▪️All new clothing has been steamed. ▪️Reasonable offers considered. ▪️Don’t have a Poshmark account yet? Sign up & get $10 off your first purchase with my invitation code: LVPRINCESS1129