Most people who suffer from flat feet do not experience pain as a result of the condition, so no accommodations are necessary to treat the issue. Runners and people who suffer from pain due to flat feet, however, will need to consider sneakers for flat feet that will help correct the problem and properly support the foot. Good sneakers for flat feet will offer support through the midsole and will not curve too far inward throughout the course of the shoe. Since every foot is different, every person will react differently to a specific shoe, so you should ultimately choose a shoe that is comfortable for you while still correcting the issues causing pain.
Most sneakers for flat feet offer extra support in the insoles. Flat feet are the result of collapsed arches of the foot, which means all or almost all of your foot will press against the ground when walking. Pronation in runners often leads to such a condition, and the runner may want to consider doing a gait correction to help alleviate the pain due to flat feet. Purchasing sneakers for flat feet can also help in gait correction by putting the foot in the proper position for walking and running. While raised supports in the insoles can be helpful, they can also be painful for some people; if you have been flat footed for a long time, start with an insole that raises the arch only slightly, then work up to more supportive insoles from there.
Be sure to choose sneakers for flat feet that are well-constructed and breathable, just like other high quality sneakers. The soles of the shoe should have adequate cushioning without being too flimsy; the soles should allow the foot to move naturally but should prevent excess movement that will contribute to flat feet or pronation. Be sure the shoes are made from materials that will allow sweat and moisture to escape from the foot to help prevent hot spots and blisters.
Choose a simple shoe that does not feature excess padding. Running shoes often feature excess padding to absorb the impact of the running motion, but excess padding can make a flat foot flex more than it would otherwise, potentially causing discomfort or pain. Choose a shoe that is comfortable but not too squishy or flexible; excess padding can push upward on the collapsed arch, causing the muscles of the foot to tire quickly and tense up.