Tops are an item of apparel that refers to all garments that are worn to cover the torso. Tops may, or may not include sleeves to cover the arms.
About Yoga Bottoms:
Yoga Bottoms are bottoms specifically designed for ease and comfort while participating in the sport of yoga. Yoga Bottoms are most often made from lightweight fabrics with high wicking ability and breathability to provide comfort, as well as stretch for ease of movement.