Fit Guide This style has a slightly longer fit. We recommend choosing your usual t-shirt size. Details Black: 100% cotton Heather Grey: 90% cotton / 10% polyester Machine wash cold. Tumble dry low. Hang dry when possible to maximize garment's longevity. Imported. The Doppler T-Shirt is a mid-weight tee ideal for everyday wear, featuring a left chest and back graphic of the FLORENCE Burgee Flag.