Dear, the single flash single shoes refer to the first wheel of the roller skates that lights up, while the other wheels do not, and they do not come with any protective gear or helmet. The packaging is in a box, and there is no backpack. The set refers to a pair of roller skates plus six pieces of protective gear and a helmet (the protective gear and helmet are not sized, they are all-size, and the helmet pattern is randomly distributed). The full flash refers to all wheels flashing, the material is PVC wheels, which are hard and not wear-resistant. Now, when you buy the shoes, you will receive a pair of wings and two small wrenches. Please note that all roller skates have brakes on one foot, and the other foot does not. QQ: 448904832, tell: 13185797603