Air Spring FX technology Double rip tape fastening. The Cloud Tuktu Fst babies boot from Clarks come in autumnal tones, crafted in premium tan leather with a bright blue accent on the heel. Authentic craftsmanship can be seen with the moccasin toe and and butt seam detailing on the heel while the lightweight EVA sole adds a casual look. Comfort is key for little feet that love to explore, so this shoe offers Air Spring FX technology with soft linings for unbeatable cushioning and a double rip tape fastening provides a secure fit. Available in whole and half sizes and different widths.