Face wiper (6)
(Other definitions for napkin that I've seen before include "Protective cloth square worn during meals" , "Cloth square used to protect clothing while eating" , "Diner's cloth" , "Cloth to stop, eg, gravy" , "Cloth used at mealtime" .)
(Other definitions for flannel that I've seen before include "Light fabric" , "Cloth used to wash the face and body" , "cooler if wet?" , "Bathroom item" , "something to wash with" .)