Polypropylene is a type of plastic commonly used in textiles and fabrics. Although not breathable in the same way as natural fibers like cotton, due to its hydrophobic nature, it allows moisture to pass through without absorbing it. This makes polypropylene fabrics feel dry, as they effectively wick perspiration away from the skin. However, because it doesn't absorb moisture, it can feel less comfortable in hot environments compared to breathable natural fibers. Polypropylene is often used in active wear and medical non-woven fabrics because of its ability to keep the wearer dry and for its resistance to bacteria and odors.

Polypropylene, a versatile and durable plastic, is widely used across multiple industries due to its resistance to chemicals, water, and electricity. Common applications include packaging for consumer products, plastic parts for various industries including automotive, reusable containers of various types, laboratory equipment, and textiles (also known as polypropene). In packaging, it's appreciated for its ability to keep moisture out, preserving the freshness of food. In the automotive industry, it's used in batteries, bumpers, and interior components, benefiting from its resilience and lightweight nature. Polypropylene's adaptability in molding processes also makes it ideal for creating a vast range of items, from medical devices to children's toys, offering a balance between flexibility, strength, and cost-effectiveness.

The yarn source refers to the origin or supplier of yarn, a continuous length of interlocked fibers used in knitting, weaving, crocheting, and sewing. Yarn sources vary widely, from local yarn shops (LYS) offering artisan and specialty fibers, to online retailers with extensive selections, and direct purchases from mills and yarn producers. The choice of yarn source can impact the quality, texture, color, and sustainability of the yarn. When selecting a yarn source, consider factors such as the fiber content (e.g., wool, cotton, synthetic), the production method (hand-spun vs. machine-spun), and ethical practices (e.g., fair trade, eco-friendly processes). Additionally, local yarn stores often provide valuable advice, workshops, and community support for crafters.