3M 1310 Banded Ear Plugs(Box 10) Flexible band design helps maintain a constant pressure, at a comfortable level, irrespective of head size. Innovative flexible band for optimum fit and superior comfort. Can be worn under the chin or behind the head  Replacement Ear tips available – 3M™ 1311 Durable plastic headband equipped with soft, flexing pads adjusting to jaw and head movements. Designed to fit behind the head or under the chin with minimal contact with clothing.