Allbirds' sustainable 'Tree' sneakers were a game changer when they debuted in 2018 — here's what they feel like after a year of regular wear - Business Insider Posted by 0x000216 October 02, 2019 Allbirds' sustainable 'Tree' sneakers were a game changer when they debuted in 2018 — here's what they feel like after a year of regular wear
