The events opens on 11th July till 26th July. This is a special event because it's a charity one; every transaction made at Hair Fair will donate a portion to Wigs for Kids, the charity of choice for Hair Fair 2015.
You can try already hair taking the demo in the group, to join it, copy and paste in your local this link
secondlife:///app/group/2e30d166-f3e5-e2de-ff72-b3da2d06ded2/about Hair Fair Demo Group
I just fell in love with one of the hairstyle by Tableau Vivant, called Scarlett.
The hairstyle is wearable with and without the hat.