These are amazingly light and feel like slippers! I've worn them several times but they're just a tad too big for me. (Let me know if you've got a pair to trade!) And, vegan. Super breathable and made of bamboo knit and a recycled cork footbed. Entire sneaker is washable! (I freshly washed them for you.) From Cariuma: This time we knit our sneakers from self-regenerating bamboo & recycled plastics from heel to toe. IBI is high performance, low impact and ultra lightweight. Wearing IBI, you'll be lighter on your feet and leave behind a smaller footprint. Please feel free to ask any questions!