A length of cloth draped over a belt and hanging down, drawn in three strokes. It is the radical for almost everything made of fabric: 帽 (hat), 带 (belt), 布 (cloth), 帐 (tent), 席 (mat).
毛巾 is a towel and 围巾 a scarf, the two words a learner meets first. 巾帼 — women's headdress — became the literary word for women themselves, as in 巾帼英雄, a heroine. The scholar's 头巾 headcloth marked a man of letters for centuries.
A CLOTH hanging down off a belt — one stroke of sash, two of falling fabric.
巾 is the radical hiding in 帽 (hat), 带 (belt) and 席 (mat) — if it was woven, it probably carries this piece of cloth.