Champion Big & Tall Vapor Performance Heather T-Shirt Big & Tall Men's PowerTrain Vapor Performance T-Shirt - Medium Weight Each color has a marble, heather appearance. 100% Polyester - soft and cool to the touch. Brand: Champion Big & Tall Champion Vapor Technology provides sweat-free comfort and keeps you dry even during the most vigorous workout. Refer to Hand Measurements chart in the photo gallery for each size's measurements.