Charles River 2920 W’s Solid T-Shirt Interlock The Women’s Tru Performance Tee is 100% Polyester Interlock (black is 4.42 oz/yd2, white is 5.31 oz/yd2) with a flattering V-neck styling for a feminine shape. It features side slits for increased mobility and a heat-sealed back neck label for comfort. Moisture-wicking and anti-microbial properties keep you cool and dry when you get moving. A great layering piece to take your look to the next level.