Boot Size :7 US / 40 Euro7.5 US / 41 Euro8.5 US / 42 Euro9.5 US / 43 Euro10 US / 44 Euro11 US / 45 Euro11.5 US / 46 Euro12.5 US / 47 Euro13 US / 48 Euro14 US / 49 Euro15 US / 50 Euro SiDi Crossfire TA Boots Black. Dirt Rider's Jimmy Lewis: "These are my new favorite boots, and I'm not alone." Dirt Bike: "Overall this +$400 piece of moto footwear rates an A-plus." Sidi utilized the latest technology along with its experience with the Force boot to create an all new off road boot with an aggressive look, but at the same time being comfortable to wear and technically able to give the highest level of performance. Sidi introduces the Crossfire to the marketplace for 2006 but Stefan Everts and Antonio Cairoli have already worn it successfully when they won their 2005 Motocross World Championships.