Purchase the Port & Company® Brights Core Cotton T-Shirt at Michaels. com. An indispensable t-shirt in our classic silhouette—with a very friendly price. An indispensable t-shirt in our classic silhouette—with a very friendly price. Due to the nature of 50/50 cotton/polyester neon fabrics, special care must be taken throughout the printing process. Details: Available in multiple colors and sizes 5.4-ounce, 100% cotton 90/10 cotton/poly (Athletic Heather) 50/50 cotton/poly (Neon Blue, Neon Green, Blue Neon, Dark Chocolate Brown, Candy Pink, Neon Blue, Pink Candy, Neon Orange, Neon Yellow, Neon Green, Neon Pink