New Allbirds Wool Runner NZ and Tree Runner NZ: The Upgrades We Didn’t See Coming
TL;DR — The Allbirds Wool Runner NZ ($110) and Tree Runner NZ are the brand’s 10th-anniversary upgrades — and our side-by-side with the Tree Runner Go confirms the improvements are real: sturdier build, roomier upper, smoother ride. We’d reach for the Wool Runner NZ on cold days and the Tree Runner NZ for warm-weather everyday …