My personal favorite sleep item is a microfiber blanket.

I have experienced insomnia, so I am quite sensitive to sleep and coffee.

I tend to eat at specific times. Even when lying down, I can't fall asleep immediately, and I especially can't sleep well if I'm not at home, so it worries me a lot.~~ Then, by chance, I folded a microfiber blanket and used it as a pillow, and the sensation touching my ear makes me fall asleep very easily... I usually sleep on my side, so when my ear, nose, and face touch it, it's so cozy and nice.