Genesis&'; most popular mask the Genesis SL has been newly designed. Features of this wonderful mask include: Genesis Quality 2-window low profile Crystal, liquid silicone injected skirt Extremely comfortable fit Easily adjusted ratcheting buckles Tempered glass lens Easy access nose pocket Adjustable mask strap Prescription lenses available: diopters -1.0 through -8.0 PLEASE NOTE, WE OFFER THIS MASK WITH AND WITHOUT PRESCRIPTION. IF YOU&';D LIKE TO ORDER THIS MASK WITH A PRESCRIPTION, YOU&';LL NEED TO SELECT YES IN THE DROP-DOWN MENU AND SELECT YOUR PRESCRIPTIONS IN THE FOLLOWING MENUS. PLEASE ALLOW AN ADDITIONAL 2-3 BUSINESS DAYS FOR PROCESSING AND SHIPPING PRESCRIPTION LENS MASK ORDERS. Return Policy for Prescription Masks: Returns for prescription masks must be in new, unused condition and will be issued store credit only. We cannot accept returns on used masks, any masks that are returned and found to be in used condition will be returned at the customer&';s expense. If a refund is requested for any item that was eligible for and utilized free shipping, a restocking fee equivalent to the actual shipping cost for that item will be deducted from the refund. This Genesis SL Quality Scuba Diving Mask is a fantastic state of the art mask which is ideal for comfort and performance! Good for scuba diving and/or snorkeling.