According to the type of air cushion, it can be divided into: airsole, zoomair, maxair, totalair (which can be regarded as an enhanced version of maxair, usually full palm) and tunedair (which is no longer used in sports shoes). According to the type of applicable players, it can be divided into: force (suitable for powerful and strong players, usually inside) and shox (mechanical shock absorption). Flight (a player who is suitable for flying high and jumping high) and uptempo (a rocker with fast feet) have gradually faded out of people's sight, but sneakers can still be classified into one of the above three categories. For example, zoomkobe series belongs to uptempo category, but it is not clearly stated that it is classified according to signature shoes: Nike is the manufacturer with the most signature shoes. In the past, many stars had Nike's signature shoes, but with the concept of team sneakers and the development of sneaker technology, it has become possible for players to wear one shoe in multiple positions, and the number of signature shoes is gradually decreasing. Now there are only three series left, zoomkobe series (Kobe's signature shoe series adopts zoomair technology), lebron series (James's signature shoe series, the first six generations adopt zoomair, and the second generation adopts Totalair), zoomkd series (Durant's signature shoe series adopts zoomair technology) has been gradually diluted by Nike, and a number of sneakers with both inside and outside lines have appeared, such as zoomhyperdunk sneakers and their follow-up sneakers. But in general, Nike will also launch a pair of shoes that are more suitable for internal wear to complete the improvement of the internal and external product lines.