This is a Goodyear-welted product. The upper and sole are heat-sealed and sewn together, not merely glued like many footwear constructions.
Elk is a soft, tumbled leather
The original Dr. Martens air-cushioned sole, providing underfoot comfort and durability since 1960. It is oil- and fat-resistant, tough and offers good abrasion and slip resistance.
[Elk] = Clean away dirt using a damp cloth. Allow to dry, then apply a clear wax-based shoe-polish to restore shine as desired. In the event of heavy scuffing or loss of colour, clean as before, but add a matching-coloured wax-based shoe polish and buff up the leather with brush and cloth as required.