Polypropylene, a synthetic polymer known for its durability and resistance to various chemical solvents, bases, and acids, is generally considered less likely to pill compared to other fabrics. This characteristic stems from its smooth texture and the way it's manufactured. Pilling occurs when fibers in fabric loosen and form small balls on the surface. Since polypropylene fibers are less prone to breaking and have a high level of chemical and abrasion resistance, they tend not to form pills as easily as more delicate natural fibers like cotton or wool. However, under harsh conditions, such as intense mechanical action, minimal pilling might occur but is not as common or severe as with other materials.

Cyc yarn stands for Craft Yarn Council yarn, a standard that categorizes yarns into different weights to help knitters and crocheters select the appropriate yarn for their projects. This system ranges from 0 (lace) to 7 (jumbo), simplifying the selection process by standardizing the yarn thicknesses across different brands. Understanding the cyc classification is crucial for achieving the desired fabric density and texture, especially when following patterns that specify a particular yarn weight. By adhering to this system, crafters can ensure their projects will turn out as intended, regardless of the yarn brand they choose.

The conversion from ounces to grams depends on the material's density; however, for yarn, we typically deal with weight rather than density. Generally, there is no fixed answer because yarn can vary widely in density and thickness. However, in terms of pure conversion unrelated to the specific characteristics of the yarn, 1 ounce equals approximately 28.35 grams. For yarn, the weight in grams can tell knitters or crocheters how much yarn they are getting in an ounce since the thickness (or "weight" in yarn terminology) can affect the length of yarn you get. Lighter yarns will have more length per ounce than heavier yarns. It's always best to look at the yarn label, as manufacturers will often provide the weight in both ounces and grams, along with the length, to help you better understand what you're purchasing.