Fluorescent yellow V-neck T-shirt made of lightweight material, perfect for running or indoor training! The material is quite thin, so the inner layer will be visible. - Brand: Nike - Color: Fluorescent Yellow - Style: V-neck - Material: 100% Polyester I've worn it a few times but am selling it because I don't use it anymore. It has been stored in my apartment. Please understand that this is a used item before purchasing. It will be folded small and packaged simply, and sent via Yu-packet Post Mini.