Cotton flannel is a soft, medium-weight woven flannel fabric that has been brushed to create a fuzzy, insulating texture known as a "nap." In this guide, we will dive deep into the world of this versatile material, exploring its construction, its benefits, and why it remains the go-to flannel fabric for clothing and bedding worldwide.

To truly appreciate this material, we must ask: what is flannel fabric made of? The answer lies in a diverse range of fibers, from traditional sheep's wool to modern synthetic fibers, all engineered to provide maximum warmth.

In this comprehensive guide, we will explore the technical nuances, rich history, and diverse applications of flannel fabric, helping you understand why this ancient textile remains a modern-day essential.