Comfortable shoes are shoes distinguished by the ease of wear and comfort provided to the wearer. Comfortable shoes are designed and manufactured using specific technologies to ensure comfort over long duration of use. Many comfortable shoes have removeable insoles to allow the wearer adjustablility in fit and room for inserting orthotics.
Spikes are specifically made shoes that have small metal (or other material) spikes on the sole of the shoe. The Spikes have a small diameter (cleats are larger knobs on the soles and a cleat could be a group of spikes). Spikes are common on golf shoes because the spikes help with traction in grass. Runners also may use spikes for the grip with the ground when running.