Amazon has the 2-Pack Gildan G2000 Men's Ultra Cotton T-Shirt (Charcoal, Royal, or White) for $7.99 with free shipping on $25+ or with Prime. Heather Navy is $8.50, Ash Grey is $8.86, Red and Dark Heather is $8.96, Forest Green is $9.20, and Safety Green is $9.40.

Made with thick and hefty fabric.