I’ve received several questions about what to use when tracing pattern pieces for repeated use (paper? tissue? interfacing?). My absolute favorite choice is Swedish Tracing Paper, which is washable, reusable interfacing (“paper” is a bit of a misnomer). You can even make your fitting toiles from this stuff, as it will stand up to sewing and seam ripping. I absolutely love it and use it for all my master patterns.
I get this from Birch Street Clothing, which sells it at a special discount (buy two rolls, get one roll free!) Click HERE to go directly to the product page.