Earplugs 3M™ 1310 with loop, replaceable tips of plugs. Soft and round foam earplugs do not pressurize the ear and fit tightly. The patented flexible bow is easy to control and ensures less pressure on the ears. 3M™ 1310 earplugs are very light, weighing only 13g and have replaceable heads (3M™1311). Designed to be worn on the back of the head or under the chin to minimize contact with clothing.