DURABLE MATERIAL - These training cones are made of low-density polyethylene vinyl material, which is very strong, will not collapse easily, and will last for many years. Each side forms a square base for all types of workouts. Four holes are drilled in the corners of the base so that the sports cone can be fixed/staked into the ground if necessary. EASY TO CARRY - It has four holes for fixing and can be easily stacked on top of each for easy storage and transportation. Carrying case for easy transport and storage. ERGONOMIC DESIGN - Are you worried that the plastic cone will break and possibly get cut when your child falls? Well, even if our training cones are stepped on or squeezed, they will retract back to their original shape. Bright colors provide excellent visibility to help you set boundaries and promote safe play in all weather conditions. MULTI-PURPOSE - The sports cone set can be used for indoor or outdoor activities, such as football, basketball, baseball training drills, theme party competitions, festival events, children's play, skating play, bicycle obstacle course, motorcycle training, racing cars, parking and Mobility exercises, track marking, dog training, horse training. Designed for use on any flat surface such as grass, gravel, sidewalks, concrete, gym floors, cement, and more.