ALWAYS Cotton Protection Ultra Sanitary Towels come with a 100% organic cotton topsheet. These sanitary pads are free from fragrances, dyes and chlorine bleaching. They have been approved by dermatologists of SHA and are certified by Cotton Inc. They have liquid locking gel and gel can`t leak. ALWAYS Cotton Protection Long are ideal for light flow with L knicker size, moderate flow with M and L knicker size, or heavy flow with S knicker size.