my head is small and this is not not small head size friendly. the smallest is still wayyyy too big. it falls right off! not recommended if you have a small head size
might be ok if lying on back but i'm a side sleeper. every time i moved my head the mask would shift on my face. that made it annoying and uncomfortable. i tried tightening the strap but that did help any. not possible for me to sleep with it.
尺寸不兼容
不兼容的睡眠姿势