Grade B is visibly worn but fully wearable lululemon: light pilling, minor fading, a small mark or a loose thread, but no holes, major stains or broken zippers. It resells at roughly 25–40% of retail.
Grade B is the value tier. Most Grade B flaws are cosmetic: inner-thigh pilling on leggings, light cuff wear on hoodies, a faded seat on older Wunder Unders. These pieces sell well in bin stores, on thrift racks and in bundle deals where buyers trade perfection for price.