The Nike Women's Pro Hyperwarm Long Sleeve Top is a top-rated base layer top for women's tennis on Amazon. It is made with Nike's Hyperwarm fabric, which helps keep you warm and dry in cold weather conditions. The long sleeves provide extra coverage and the slim fit allows for easy layering under your tennis outfit. The top is designed to move with your body and provide a comfortable fit. With its high ratings and positive feedback, this base layer top is a reliable choice for women tennis players looking for warmth and performance.