The Gynecomastia Tank Top is made from 32% spandex and 22% nylon wrapped on 46% pure cotton to flatten your chest.

The compression is focused on the chest area, whilst the fabric around the mid-section is relaxed and made from 100% combed cotton. The gynecomastia tank top is made from high quality materials in the U.S.

INVISIBLE under shirts: Like an undershirt 
INVISIBLE under T-shirts: No