A Closet Essential: Amazon Essentials Women's Relaxed Fit Sleeveless Muscle Tank The Amazon Essentials Women's Relaxed Fit Sleeveless Muscle Tank ($17) is perfect for layering and so versatile, it can be dressed up or down. It comes in a variety of colours as well. Image Source: amazon.com Amazon Essentials Women's Relaxed Fit Sleeveless Muscle Tank $17 from amazon.com Buy Now