Two new additions to the yarn stash from String Theory Colorworks. Both yarns are self striping in really bold and fantastic colors. The Density yarn was formerly the brim of a hat that came out ridiculously small and has now been frogged and is back to a ball waiting to be knit. Such fun colors and they stripe wonderfully. You have to love the science themed names from the dyers. The husband and wife are an engineer and biologist, respectively, so they have a thing for science.