The VIRUNGA: the sustainable slip-on knitted for comfort (no laces) 100% vegan, ultra-light and comfy. Made from recycled and bio-based materials. These might be the lightest shoes you will ever own! Throw on the Virungas after a long day of surfing, to go exploring the city, or for a weekend in the countryside. Weighing less than 0.4lbs, you'll be bringing the Virungas wherever your next adventure takes you. Materials and Features Upper: Made of 4 recycled plastic bottles. Our Knit is OEKO TEX certified. 100% organic cotton laces. The knit construction brings comfort & breathability to a whole new level. Insole: 100% natural cork, harvested algae foam and EVA make a perfect sustainable combo for maximum comfort. Removable insole. Outsole: Natural algaes and EVA brings lightness & cushioning while rubber reinforcements guarantee maximum durability. 11 gallons of clean water returned to habitat per pair (BloomFoam tech). 27 m3 of air cleaned per pair (BloomFoam tech).