Footwear, Shoes and Boots Design XpreSole Panto Rainboots by Wilson Hsu XpreSole Panto an ecofriendly spent coffee grounds reused and ultra lightweight rainboot. One pair of boots makes from 15 cups of spent coffee grounds, a massive source of greenhouse gases when they are landfilled. With the circular economy in mind. It upcycles spent coffee ground as the major component. The innovative process covers a pair of boots lifecycles closely associated with community engagements from material harvest to reuse. With the innovative coating technology, XpreSole Panto designs as a rain boot based on a balancing act of sustainability and functionality.