Our silk sleep masks are filled with 100% natural mulberry silk floss on BOTH sides and feature stitching so fine it can't be felt on your skin. Only super-soft, super-smooth mulberry silk offers the breathable, cool relaxation of the soothing masks found at the world's premier spas.Super lightweight silky soft sleep mask make you enjoy a comfortable, undisturbed sleep anytime and anywhere. They have a firm fit to block light but not so firm that it puts pressure on your skin. Our silk sleep mask does not leave any lines or marks on your face.Adjustable head strap - Elastic design can be adjusted effectively relieve pressure. That comfortably fits around the back of the head to hold the mask in place.Get the benefits of total blackout, whether at home, in a hotel or on the plane (where bright light and dry air can be especially harsh). The perfect travel accessories to help keep you feeling rested and refreshed. Ideal for dry-eye sufferers, as the breathable, natural fibers of mulberry silk allow healthy oxygen in while keeping dry air out.You have nothing to lose with our SIX MONTHS money back guarantee. If you want to return the sleep mask, just email us through amazon, and we will be happy to provide you with a 100% money-back refund.