They are made of bamboo and cotton to create a memory foam so they are very cushioned and extremely comfortable. The 3D area makes it so that my eyelid doesn't touch the mask so I feel my eyes don't get squished like they do with a typical/traditional eye mask. It rests gently on the face all night and I don't have to fuss with it to get comfy.
I also love the 3D design because it blocks all the light out since it goes all the way around. Who doesn't want to keep the sun out when you want to sleep in, right?!