Material: 95% Cotton, 5% Spandex. Contrast (Sleeves, pocket and back): 95% Rayon, 5% Spandex.
Fit: True to size. If in between sizes, size down for a slightly fitted look. For a looser fit, go with the larger size. Keep in mind the body of the shirt is 95% cotton so it may be best not to size down if you plan on drying. First model with black sleeves is a true small and wearing a small. Second model in blush is typically an x-small/small and wearing a small.