Made of PU (polyurethane) material, it is highly durable and can be used both indoors and outdoors. Perfect for training. 【Recommended for】 ・Those looking for a full-fledged practice ball for club activities or club sports. ・Parents looking for a high-quality ball for their children's volleyball practice. ・Those looking for a gift for volleyball enthusiasts. Size: Size 5 ball (Official for general, high school, and junior high school boys) Material: PU (polyurethane) Usage: Indoor/Outdoor use Condition: Brand new, unused Air: Shipped deflated (pump not included)