Seriously I did get a query already about yarn substitutions. I knit this with Elann.com "Den-m-nit" but that appears to be discontinued. There are two special effects inherent in this yarn: one is that it will fade like blue jeans over time as it's washed and used, and another is that it will shrink %10 to %20 the first time it's washed. Rowan Denim yarn behaves the same way and is widely available, thus it's a perfect substitution -- but expensive. Another less-well-known option is Twilleys Freedom Denim Yarn. I found a couple online vendors for this:
- Texere in the UK
sells this for 2£/50g, which is currently about $3 US. Even with the shipping, for 13 balls (what the pattern suggests) this is cheaper than US sources.
- Erica's Yarn sells and ships in the US for $5/50g.
Some unmercerized cotton yarns do shrink and others don't. Worse, unmercerized cotton yarn isn't always advertised as such. For example, I've used Mission Falls 1824 cotton and Blue Sky Organic cotton without any noticeable shrinking (and they're both great yarns though with the Blue Sky you have to live with some pilling and fuzzing). Knitter's Review confirms that Mission Falls 1824 cotton is unmercerized and various blogs say that the Blue Sky cotton is unmercerized. So just getting an unmercerized yarn doesn't guarantee that it will or won't shrink.