Sienna’s 100% vegan and cruelty free range of incredible natural and non-toxic nail polishes use the latest in cutting edge green science. Byron based Sienna's plant based nail polish formulas use raw, sustainable ingredients including sugar cane, cassava, cotton and corn. Building on their pioneering vegan, cruelty-free, non-toxic formula, Sienna are now the world’s first, nano-particle free nail polish, that’s healthy for people and the planet too.