This is a simple white cotton undershirt. It's made of sturdy cotton fabric; not flimsy. It looks slightly off-white in the photos because they were taken under warm-toned lighting, but it's actually white. When it gets cold, I used to put it on over a short-sleeved romper. It's easy to put on even when the child is lying down ^ ^ Cotton is the best for kids who sweat, even in winter! I offer a discount for multiple purchases, so please take a look at my other items as well! I will ship using the most affordable method m(_ _)m