At the 1995 Brazilian Grand Prix, Rubens Barrichello incorporated part of Senna's helmet design into his own. For the 2011 Brazilian Grand Prix, another variant of Senna's helmet was used by Lewis Hamilton and by Barrichello too. Hamilton used the design with permission from Senna's sister Viviane and the helmet was later sold in support of the IAS. At the 2015 Brazilian Grand Prix, Hamilton again varied his helmet design (this time, the rear only given FIA restrictions on design changes in force from 2015) accompanied with a Twitter announcement stating "Just for you, Brazil!! A tribute to the greatest".