Holds  three pairs of trail lenses. Adjustable PD from 59 to 67mm fixed bridge. Temples adjust . Drop Cell style - holds lens loosely for easy exchange.. Adjustable nose rest is separate version as listed.  Weight: 1.0 oz (29 grams). Replacement nose pieces are available 

Child versions have adjustable PD from 54 to 58mm. Weight: 1.0 oz (29 grams).