COMFORTABLE MATERIALThe sleep mask is made of high-quality soft cotton, skin-friendly, high cotton content, comfortable and breathable. Take care of your eyes, suitable for sensitive skin. It can also be worn under glasses, smooth and durable, comfortable to wear. 3D DesignThe sleeping eye patch is made of 3D grooves, the groove design will not cause pressure on the eyes, will not touch the eyes, will not make the eyelids and eyelashes uncomfortable, the material is soft, breathable and elastic, easy to put on and take off, perfect for lazy eye training, surgery recovery and daily use. StrapSleeping Eye Mask Adjustable Elastic Strap (7 inch-17 inch), suitable for most people, you can adjust it to the length you need according to your head size, not tight and very comfortable, also suitable for adults and children. Widely usedThe eye patch can be used for amblyopia, strabismus correction and rehabilitation after eye surgery, it helps with daily eye care and repair, and it is also perfect for children who need to apply the patch on a regular basis. In addition, it can also be used for occasions such as Halloween parties, costume parties and role playing. Set includes 2 black lazy eye patches + 2 blue lazy eye patches, reusable.