Rayon is considered semi-synthetic. The raw ingredient, usually wood pulp, is natural, but the processes used to refine it stop it from being classified as such. It’s the closest replica to silk, and very soft. Mostly used in dresses and blouses, it's also found in loose-fitting sportswear, like tank tops and t-shirts.
Decoration Supplies MDR - MADEIRA Rayon thread
American Apparel TR401 - Unisex Triblend Short-Sleeve Track T-Shirt
Bayside 5710 - Unisex Triblend T-Shirt
Next Level 6071 - Men's Triblend Long-Sleeve Crew
Bella+Canvas 8413 - Ladies' Triblend Short Sleeve T-Shirt
Bella+Canvas 3413C - Unisex Triblend Short-Sleeve T-Shirt
Bella+Canvas 8816 - Ladies Slouchy T-Shirt
Bayside BA9570 - Unisex 4.2 oz., Triblend T-Shirt