Check the listing for details. Hollis M-1 Dive Mask. Condition: New. Listed at 114.95 USD. Hollis M-1 Dive Mask PRODUCT DESCRIPTION Visibility is the most important aspect of any dive. The M1 mask raises the bar for optical quality and distortion free vision. This lens is an extra clear glass which is valued for its attractive appearance and optical qualities. The low iron content produces a higher light transmittance and a reduced green tint inherent in other glasses. This makes the lens distortion free and helps improve color and visibility in low light conditions underwater. We ship Monday-Friday 8:30AM - 5PM of EST While some orders would not be shipped out same or next day, they will be delivered by the eBay estimated delivery date. If you desire the item sooner, please, choose expedited shipping options. Please, contact us through eBay messaging if you need more information on the product