Use 'wispy' to describe something that exists but barely visible or tangible. The mountain's peak had a wispy veil of mist.
Pro Tip 2/3
Lack of Fullness
'Wispy' often suggests a lack of thickness or fullness, like objects not having a solid form. He had a wispy mustache that seemed to disappear when he smiled.
Pro Tip 3/3
Delicate Features
Describe delicate, fine features using 'wispy', often in a fragile or graceful way. The dancer's movements were light and wispy.