The necker is a much maligned item. It started out as not only a Uniform item, to identify one as a "Scout", but as an all purpose "be prepared" item. It was expected the Scout would wear his uni to all Scout activities (hence the term "Field Uniform") and even to ordinary places. As a Scout, he would be expected to be available to help and "be prepared", "why , for any old thing".
The old Scout book I have lists no fewer than 52 uses for a neckerchief (remember, these were four sided, 36" neckers.). Signal flag, bandage (many types), arm sling, horse bridle, dust mask, sunhat, sweat ban