The patterns includes both the directions to do the calculations manually and also a spreadsheet with formulas to do the math on your behalf.

Every product you purchase comes with all the files you'll need to make full use of the patterns.

Wool/acrylic or wool/nylon blends, cotton/acrylic blends are best for ensuring that your sweater retains its shape during wearing and washing.

If you're not happy with your purchase than I provide a 1 year money back guarantee - no questions asked.