Jeans that fit well are rarely easy to find. Walden Lam’s startup Unspun not only uses a proprietary body scanner to make a perfectly tailored pair just for you, but does so using sustainable fabric and with minimal waste. Named one of Time’s 100 Best Inventions of 2019, Unspun is constantly seeking new ways to be more sustainable; last year it launched the world’s first digital-fit jeans that can be infinitely recycled.