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welcom to msywo07 Shope! Description: 100% Brand New and High quality Special designed mirror glasses, gives you a horizontal view while you are lying down to read a book or watch TV With built-in mirrors for the optimal direction of the gaze In this case, these glasses are right for you The built-in mirror ensure that the field of view is rotated within 90 ° around the horizontal axis So keep flat in the healthiest way, you can still use these glasses for enjoying entertainments The convenient anti-reflective coating and clear representation of the image help to relieve neck cramps and eye strain Strict material selection and precision processing, internal reflection prism equivalent in glass plate, so there is no influence to the user's vision Have obvious effect in preventing and alleviating cervical spine, lumbar spine and shoulder fatigue and discomfort Efficiently reduce pain and discomfort in the head, neck and lumbar spine after long time concentration Read a book without eye fatigue or physical strain or watch TV in horizontal comfort It is helpful for you to protect your cervical vertebra Specification: Gender：Unisex Material: Plastic + Glass Color: Black Size：S, M, L, the size details are shown as follow: Size Lens Height (cm) Lens Width (cm) Total Length (cm) Nose Bridge Width (cm) Leg Length (cm) S 3 7 15 1.4 15 M 4 6 14.5 1.5 13 L 4.3 6.5 14.5 1.5 13.5 Note: 1. Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. 2. The colors may be different as the difference display  Please understand Package included:     1 x Sunglasses Please kindly Note: Items will be repackaged to save your shipping charge & to be environmentally friendly. We guaranty the item will be protected well in bubble bags, No retail box!