A "leather outsole" refers to the bottom part of a shoe or boot, which is made of leather. It is the part that comes into contact with the ground when walking and provides traction and durability. Full definition
Durable leather outsole with lug pattern for added grip. (kelkoo.co.uk)
Durable leather outsole with a rubber heel lift. (kelkoo.co.uk)
The soft haircalf, leather, or suede upper features an elasticized collar for an easy, flexible fit, while the smooth leather outsole promises a soft step. (thefashionablehousewife.com)