Answer:
A seasonal fashion statement named for the weather it's worn in.
Hearing something unexpected or touching a live wire can have this effect.
What can travel around the world while staying in a corner?
What is so delicate that saying its name breaks it?
What is red and smells like blue paint?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.