Amazon.com description: Product Description: Cardigans with a Conscience (Leisure Arts #5153) presents six earth-friendly knit designs by Melissa Leapman. Each uses exciting new yarns made from renewable natural fibers such as silk, wool, cotton, and bamboo, or recycled fibers. Projects include Dressy Cardigan, Hoodie Vest, Hoodie Jacket, Little Cardi, Mixed Stitches Cardigan, and Casual Vest. Each can be made in your choice of six sizes, from Small to 3X-Large. Skill levels are intermediate for all except Little Cardi, which is easy. Why not relax and enjoy true peace of mind while you knit these vests, hoodies, and cardigans? They're not only lovely--they're eco-conscious!