Butter Keyhole Tank in Very Black

Meet your new favorite tank for moving, lounging, and everything in between — the Spanx Butter Keyhole Tank, now available at Baseline Social, where elevated athleisure meets real-life comfort. Made from buttery-soft performance fabric, this tank feels like a second skin while offering sweat-wicking power and 4-way stretch for all-day wearability.

The adjustable ruched keyhole back lets you switch up your look — pull it tight for a flattering cinch or keep it relaxed for extra airflow. With a body-skimming fit, crew neckline, and added shoulder coverage, it’s as flattering as it is functional.

Whether you're heading to a low-impact workout, running errands, or just loving the throw-on-and-go ease, the Keyhole Tank delivers effortless style with zero fuss. Available now at Baseline Social, your go-to for stylish, comfortable pieces that move with you.