Allbirds Wool Breezer Ballet Slip On Flats in Calm Cargo Size 7.5 Pre Owned. Gently Used Condition. No Visible Flaws. The polish of your favorite slip-on meets the silky-soft and breathable low-impact materials of this ballet flat you can toss in the wash. Women's Size: 7.5 Color: Green, Calm Cargo - Machine Washable - Merino wool upper and lining/rubber sole - Imported Ballet Flats Slip On Casual Comfy Comfort Wool