The AS Colour Its Britney Mens Blk Tank is the tank for you. It features low and raw (unsewn) armholes that are perfect for the gym. It is a regular fit sleeveless tank tee made from 100% combed cotton. 
*AS Colour is an Ethical Fashion brand.

.: 100% combed ringspun cotton (fiber content may vary for different colors)
.: Light fabric (4.4 oz/yd² (149 g/m²))
.: Regular fit
.: Raw armhole edges