Nike Womens Signal Swoosh Sleeveless Muscle Shirt Pink/White 50% Polyester/25% Cotton/25% Rayon Machine Washable Show off some hard-earned muscle in the right on-trend Nike Signal Muscle Tank. Because we all know muscles are always in style, this tank is a must-have all year long. Featuring a longer hem, slightly loose shape and wide armholes, this sporty tank gives a peep of your favorite bright sports bra. A stellar blend of three fabrics makes it ultra-soft, while the bold Nike logo splashed across the front is just plain fun. Rock it with leggings and take your gym style to the next level.