Here's why:

* Wispy: Cirrus clouds are known for their delicate, feathery appearance. They look like wisps of hair or strands of silk against the blue sky.

* High in the sky: Cirrus clouds form at very high altitudes, typically above 20,000 feet (6,096 meters). They're made up of ice crystals, which form at these cold temperatures.

Let me know if you have any other cloud questions!