Lightweight tanks are made from a range of fabrics, including cotton, polyester, nylon, and blends such as cotton/rayon/spandex; some listings also note mesh and rib-knit constructions.
Fabric-weight labels vary and can span from "Extra Lightweight" and "Lightweight Fabric" up to "Midweight" or "Year-Round Fabric Construction," so options cover extra-light through midweight and year-round builds.
Many lightweight tanks emphasize breathability and moisture control, using breathable cotton-rayon blends, moisture-wicking fabrics, or full mesh/power-mesh constructions to increase airflow.
Lightweight tanks are presented as versatile pieces for casual wear, workouts and yoga, lounging, and as undershirts or sporty outerwear—many listings specifically call out fitness and workout use.
Transparency varies by item: some tanks are unlined or made from see-through mesh, while others are opaque and non-see-through. Opacity depends on the specific fabric and construction.
Construction features that enhance comfort and durability include seamless builds, power-mesh or compression fabrics for support, and flatlock seams to reduce chafing and improve longevity.