This design of Elizabeth Zimmermann's is as classic as her Baby Surprise Jacket. In the streaming video Meg Swansen shows numerous variations including a Child's Ribwarmer, Meg's Knee-Length Ribwarmer, and EZ's Butterfly Jacket (featured in Wool Gathering; pictured at left), from 1956 McCall's. The classic ribwarmer is a utilitarian and attractive garment (Meg wears hers almost daily in winter), the knee length version is a warm, long over-layer and the butterfly is sleek and graceful. Techniques shown include: Invisible cast on, increasing, short rows, garter-stitch weaving, after-thought pockets, EZ's applied Icord, 3-Needle I-Cord Cast Off, Reversible Phoney Seams, Sport-Jacket Vent. High-speed Wi-Fi is necessary for the best streaming quality.