|Silk Knitting Yarn .Com Worsted Silk
The yarns above in the washcloths photo are organic, vegetable-dyed cottons. They don't hold much air, so adding texture to the fabric is one quick way to add warmth to a garment made with them. The texture in each cloth is different, with the ribbed texture being the warmest, and the diagonal cable ridges being the coolest.
When you're modifying a pattern, adding texture can make a significant difference in the warmth of the finished garment. It will also change the amount of yarn the pattern requires. A general rule of thumb is the more texture you add, the more yarn you'll need. Adding a few bobbles will require less additional yarn than changing the entire pattern to intricate cables. Added texture can require up to 40% more yarn! Plan accordingly.
If you know a pattern will receive hard wear, you may choose to add texture to increase the strength of the fabric. Palms of mittens can be made stronger by making them seed stitch or linen stitch instead of stockinette. Heels and toes of socks can be made in eye of partridge or 1x1 rib to extend their wear.
Lastly, remember that most textured stitches knit up at a slightly different gauge, so in order to make sure your garment will be the right size in the end, swatch the textured stitch. If there are more stitches per inch, you'll need to go up a size or two. If there are fewer, go down a size. Enjoy the warmth and beauty of added texture in your work!