Many spinners are wary of using their yarns when weaving. There are ways to guarantee success as you learn about the requirements of weaving yarns. Of course there are basically there are two types of yarn required, warp and weft. Most people think yarns for weft can almost any yarn like stuff, and that warp requirements are very stringent. Both statements have validity but neither statement is completely true. I will talk about the various properties of yarn and how they can be manipulated when hand spun and used for weaving. Lots of hints at warp-speed.