Birkenstock Kids - Rio Vegan (Toddler/Little Kid/Big Kid). Color Iridescent Matcha Microfiber. On sale for $62.96. MSRP $69.95.. Brand NameBirkenstock KidsProduct NameRio Vegan (Toddler/Little Kid/Big Kid)ColorIridescent Matcha MicrofiberPrice$62.96MSRP: $69.95