This rashguard is 80% polyester and 20% Lycra. Design is a Stretchy vinyl heat pressed on, designed to last over a year. Pick the rank you want. Feedback on the shirts is that they fit tighter than expected, so please order accordingly. Many people have been happy ordering up a size. As they are made to order, refunds and/or replacements can only be given if I make a mistake in some way. Please note, this is a RASHGUARD, commonly used in BJJ, Wrestling, Surfing or Swimming. Some people have ordered expecting it to be a T-shirt. It is compression.