But, cotton shirts reign supreme over poly blends and other synthetic fabrics. Right now, Amazon has Hanes T-shirts made of 100 percent cotton in a four-pack for just $11.92. Hanes Men's Short Sleeve Essentials Crewneck Cotton T-Shirt, Black Multipack — $11.92 (was $26) Hanes See ItT-shirts are a summer staple, and these are great for the warm months. They’re made from 100 percent mid-weight cotton (as long as you get the black or the green, which are the only colors on sale), which comes with several advantages. They do go up to size 4XL, which is great because cotton T-shirts will tend to shrink a little after the first wash.