The Pentagon has announced that Israel’s Elbit, is to be the sole supplier of helmet mounted display systems (HDMS) for all 4,000 F35 stealth aircraft. The deal is worth more than $1 billion over 10 years. Already 100 F35 pilots have tested and approved the new helmet.
http://www.ynetnews.com/articles/0,7340,L-4439983,00.html
http://www.reuters.com/article/2013/10/10/lockheed-fighter-helmet-idUSL1N0I01OY20131010