NIB Children's Trainers Saucony Jazz Double HL size 1 Bought two sizes and he had already outgrown this size. Brand new, never worn. Children's Trainers Saucony Jazz Double HL The Jazz Double Hook & Loop from Saucony is an old-fashioned shoe with a suede and nylon upper. Lightweight, breathable and durable, this sneaker is proof that sometimes nothing beats the original.