Boys trainers in blue, Skechers Flex-Glow 4 Jnr, boasts a man-made upper, comfortable lining, and footbed. Perfect for everyday wear, your child will love the style and comfort of these shoes. Skechers S-Lights®: Flex-Glow Ultra. This colorful sneaker features an ombre mesh upper with synthetic overlays, fixed stretch laces and Adaptive Closure, plus a tech-pieced light-up midsole. Skechers Boy's S Lights: Flex-Glow Ultra Sneaker in Blue, Size 13.5. Upper made of synthetic and textile.