The XS Scuba M Line Mask is a great mask for those who want to add either negative or positive diopter lenses for vision correction. The mask has all the features of a quality dive mask such as a crystal silicone mask skirt and head strap with a rugged polycarbonate frame. The mask skirt has a double feathered edge and the head strap is a wide split strap design. The skirt and strap combined for an excellent seal on the face. The mask uses updated swivel quick-disconnect buckles for strap adjustments. The XS Scuba M Line Mask comes with an easy to reach one handed nose pocket for ear equalization. The mask has tempered glass lenses, which if replacement is required with the diopters, can be removed without requiring tools and can be done with only your fingers. For diopter lenses see SKU’s: XSSMCL or XSSMCLP. This low volume mask provides a wide field of vision, is available in multiple colors, comes with a protective mask box and is covered by a 24 month limited warranty.