It's usually called tank top, camisole, or cami.is a sleeveless undergarment for women. They often have a soft wide shoulder strap. Originally worn as an undershirt, It's a Perfect option during various indoor activities and outdoor excursions, such as yoga, sports, running, cross-training and etc. They have become increasingly used as daily tops or functional vests. They can be worn alone or as a layering piece. The camisole is usually made of satin, nylon, or cotton.