Chaiten is a 100% silk. It's a raw silk, so it has a bumpy texture, but still retains softness and drape. The colors are rustic, but soft. I love it! 22 sts/4", 100g/309 yds, $20 per skein.
Ulmo is 100% cotton. 22 sts/4", 100g/202 yds, $14 per skein.
And here's my progress with the Lonco. I knitted a headband! The colors came out great, it washed beautifully (cold water, by hand).
Here's the stitch pattern:
Multiple of 3 + 2
Row 1: K1, *yo, sl 1 purlwise, k2, psso the k2: rep from * to last st, k1.
Row 2: Purl
Repeat these two rows.