Women's Shells and Sleeveless Top patterns to knit in fingering, sport, dk, worsted or bulky yarn. Knit yourself a sleeveless shell in bamboo, cotton, wool or silks. These knitted garments work up fast, since they have no sleeves. Fingering weight shells are thin and are the perfect weight for a sleeveless top. Bulky knits up very fast, and you can be done in a day or two. Put a tee or blouse under one of these for layering options.