Muscle Tank (fits loose but, size up if you want oversized and flowy) A feminine version of the muscle tank, this must-have style is designed with our exceptionally soft poly-viscose fabrication that softly drapes around curves. The modern elongated armholes and curved bottom hem make it perfect for layering. Features: Sideseamed. Relaxed, drapey fit. Low-cut armhole. They have curved bottom hem.