Comprising 54 replaceable pieces, Nendo House and Japanese sporting goods brand Molten's collaborative soccer ball doesn't need to be pumped up to play with. It's airless, which means it can never go flat. Instead, it's assembled like a puzzle — an easy one — using softer, recycled propylene and elastomeric synthetic resin pieces inspired by traditional Japanese woven bamboo balls. Without air, it's under less pressure and thus less painful to kick barefooted, a testament to the sport's far-reaching, no-frills nature. In addition, for every 10 sold, Molten will donate to deliver soccer balls to various shelters and schools.