Fabric handkerchiefs are made with 100% cotton and can be reused indefinitely, just toss in with any regular load of laundry when soiled.
Flour sack is a lightweight, airy, and very absorbent fabric - FS is available only in white.
Cotton is mid-weight, similar to quilting cotton and Flannel is heavier and thicker.
Fabric colour may be patterned, trim colour is the perimiter thread trim.
Fabric will soften with wear and washing.