Allbirds Tree Breezer ballet flats in navy blue. Breathable eucalyptus tree fiber knit upper that moves with your foot, soft grey merino wool footbed, and Allbirds' SweetFoam sole made from sugarcane. The travel-and-office flat people buy over and over - light, machine washable, and no break-in period. Like new. Knit is clean and even with no pilling, snags, or stretched-out spots, the wool insoles are still plush and unmatted, and the soles show almost no wear. Barely worn. • Size: Women's 9 • Brand: Allbirds • Style: Tree Breezer • Colors: Blue • Machine washable, eucalyptus tree fiber Smoke-free home. Bundle to save! Reasonable offers welcome.