Metta is a veg tanned calf leather made with a diamond pattern imprint and treated with beech oil to resemble the famous deerskin leather found in the wreck of the Metta Catharina in 1973. It is a soft and pliable leather that I think works perfectly with natural stitching. Straps produced with Metta leather will be approx 4mm thick and are priced as follows: £85 with a free spring bar buckle £90 with a sewn in buckle £95 with a screw bar buckle