Stretchable ear loops, perfect fit Stretchable ear loops allow for a perfect fit. EnerPlex recommends using the attached sizing chart to find the best mask size for your face shape and size. A simple design combined with easy-on loops allow for easy on and off with the EnerPlex Washable Face Mask. Three layers of fabric - water resistant Constructed to made from three layers of high quality fabric. quality fabric, the reusable face mask is water resistant and breathable. The tightly woven mid-layer serves to keep out anything floating in the wearer's surroundings, while still allowing unrestricted breathing. Flatlock Seams Durable and strong, flatlock seams of the mask create a perfect fit. on the bridge of the nose and cheeks, and secure the mask under the chin. Soft materials allow you to breathe and speak comfortably while wearing the mask. Product Name: Mask Product Material: Cotton Product Weight : 50 g Product size: free size Product color: black Scope of delivery: 5 pieces