Scuba Max MK-121 Navigator Scuba Dive Mask with Case - Size Medium- Black/Clear This Scuba Max navigate scuba dive mask with case is in excellent condition, only tried them once before and they work great for diving! They are a -4 prescription. Comes with GoPro attachment and case. FEATURES: - They are a -4 prescription lenses.. if you want a new prescription you can also get it – Medium silicone skirt – Color - Black/Clear – Swivel Buckle Design – GoPro attachment - Size - Adult Medium Fit All of my items come from a smoke and pet free home. Feel free to make an offer :)