The midsole is the most important part of a shoe. Sandwiched between a shoe’s upper and outsole, the midsole is what you stand on.
Midsoles are made of thermoplastic foam. The foams have varying degrees of hardness. Hard foams offer more support than do soft foams. Soft foams have better cushion than hard foams.
It is important to buy shoes with the appropriate amount of hardness. Hard shoes sometimes irritate people that don’t really need hardness. Soft shoes may not well support the unstable foot and ankle system.
The Training Station understands all of this, and more, abut sneakers. If you need the right pair, we’re the folks that will find it.