Sidi's famous Millenium 2 sole is mated to a synthetic leather upper for the best combination of comfort and performance in this category. The design for the T-2 is tongueless and lined for sock free comfort. A large heel strap aids getting in and out quickly in the transition area. The straps are set up in opposing directions so you have good control of the bike while adjusting your shoes. Sidi will donate a portion of each womens shoe model sold in the US to prevent and treat breast cancer. Learn more at: www.pinkribbons.org and www.tourdepink.org.