Allbirds Sugar Zeffer Flip Flops New with Tags Size Womens 6 / Mens 4 Black Perfect blend of bounce & cushion; A more natural flip-flop made with sustainable sugarcane; Engineered with the world’s first carbon negative green EVA With a sugarcane-based material that’s soft in all the right spots and cushiony where it counts, the Sugar Zeffer is about to become your new summer staple. Best for: Casual strolls, sunny skies, maybe even a poolside soirée Materials: Made with SweetFoam®, our proprietary material made from sugarcane and the world’s first carbon negative green EVA (EVA = the material used in just about every footwear sole) Straps made with 100% recycled polyester Where It's Made: Vietnam. from pet-friendly, smoke-free home