The portion of the shoe sole upon which the foot or sock rests while in use Also known as the sockliner See the color-coded sneaker for an illustration
The insoles of a pair of shoes are the soft layer of material inside each one, which the soles of your feet rest on. the inside part of a shoe, or a piece of cloth, leather etc which is the same shape as your foot that you put inside your shoe
The inside sole of a boot or shoe; also, a loose, thin strip of leather, felt, etc
A layer of material shaped to the bottom of the last and sandwiched between the outsole/midsole and the foot inside the shoe It is the structural anchor to which the shoe's upper is attached In most of our boots it provides the torsion and lateral rigidity and determines the shoe's heel-to-toe flex motion