We use only high-quality ball cover materials such as merino-wool felt, thick polyester fabric or leather-like coated polyester fabric. The seams are double-stitched with strong polyester yarns to guarantee a safe and long-lasting usage.
The zippers we are using are heavy-duty original YKK zippers. The seamless inner ball that holds the air is custom-made for us only. We use eco-friendly Phtalates-free PVC with high burst resistance.