It's stretchy and very comfortable to wear. It would be lovely to use as an inner layer. I have checked for stains and fraying myself, but there is a possibility I may have overlooked something. Please understand that I cannot accept any claims. I also do not accept returns, so please understand. Color: Navy blue Material: Cotton Color/Neck: U-neck Transparency: None Season: Autumn/Winter Stains, tears, odors, etc.: None