This is your new best friend, a complete game changer. The satin or jersey under cap or under hat sits under your beanie hat and means that...

a) you don't get 'hat hair'! This allows you to wear a beanie out for example on the way somewhere and remove it when you get there and your hair will be fine! So you can be warm!

b) you don't get a big line across your forehead when you remove your hat.

c) you don't need to wash your hat (wash your cap instead)

d) You don't get an itchy head!

You all went crazy for this on my Insta stories. Available in black or beige (in jersey or satin). The jersey version is very similar and jersey is often used to reduced frizz on curly or wavy hair. 

One size fits most.