Nike flex 2017 run childrens trainers the nike flex 2017 run childrens trainers offer a cushioned insole and a padded ankle collar for comfort and a single touch and close fastener with elasticated laces to provide a secure fit these nike trainers have a moulded outsole and a woven upper with perforated designs alongside nike swoosh branding kid trainers cushioned insole padded ankle collar single touch and close fastener moulded outsole perforated design nike branding upp