Zimmermann Cassia balloon sleeve crop top in very good condition. 100% floral linen fabric. Sz 1. Zimmermann’s pink Cassia top will effortlessly bring the label’s inherent femininity to daily edits. It’s made from painterly floral-printed linen that’s gently gathered across the square-neck bodice, which is trimmed in scalloped piping and framed by voluminous cropped balloon sleeves for a statement finish.