These tanks are made from several fabrics: rayon/spandex blends (95% rayon, 5% spandex), recycled polyester/rayon/spandex blends (63% recycled polyester, 33% rayon, 4% spandex), cotton, and pre-shrunk poly-cotton blends.
Many maternity tanks are nursing-friendly, offering double-layer front openings or built-in nursing functionality for discreet breastfeeding, plus snap or placket closures to make feeding access easier.
Tanks accommodate a growing bump with features like pleated hems and ruched sides; lengths vary by style, with some sitting at the waist and others extending below the waist.
They’re sold both individually and in multi-packs—for example, some listings offer three-piece packs alongside single-item options.
Nursing access is provided by double-front openings or double-layer designs, and by closures such as snap plackets or front plackets to simplify feeding.