If you are looking to buy one pair of shoes to cover various exercise needs, then mens cross training shoes may be the best shoe of choice. They are a very versatile athletic shoe. Most people prefer them when weight training and doing some form of cardiovascular training.
Some of the most essential requirements such as support, cushioning and flexibility, are important elements incorporated into cross trainers. They should not be in excessive quality in either one of these requirements. Meaning, you would not want to buy something that states highly flexible or light support. Other details you may want to consider when buying cross trainers would be breathability and if they are lightweight. Look to see what fabrics they offer.
To best size cross training shoes, you should have room in the front of the toe, the longest toe, to the front of the shoe. The general rule is to leave one quarter of an inch to half an inch between the biggest toe and the front of the shoe. The heel should fit so you can have some movement, but you still want them to fit well enough not to slip. Cross training shoes are made with a good general comfort level and with great durability in mind.