Does this shirt have fleece on the inside?

Hi Brynn! This is a t-shirt so no fleece. Our fleece hoodie however does have fleece inside: https://www.amazon.com/dp/B07K6XWFNP Thank you for checking out our products! -Ann Arbor T-shirt Company

Does this run true to size?

Hi Courtney! Thank you for reaching out with your question! For sizing, please refer to our Sizing Chart which can be found under our Product Images. The long sleeve product is new and not updated with a size chart just yet so I can direct you to the size chart for the short sleeved product in the meantime: https://www.amazon.com/dp/B00G97IY4M/ These two are the same brand and same specifications. A small starts at 18" wide (36" around) and 28" in length and increases by 2" in width and 1" in length with each size. For Body Length, please measure from armpit to hem. For Body Width, please measure from armpit to armpit. Also note that the units used in our Sizing Chart are Inches. If any further questions arise, please let us know! Wishing you a great day! -Ann Arbor T-shirt Company