These highly functional smart phone outer can be combined with the smartphone inner to make the smartphone system OR can be used separately as a single layered short during running or workout. The combination inner (has to be bought separately) has a special pocket in the inside layer is made to stash your smartphone and even listen to music while running. Anti-bacterial, anti-stink and four way stretch inner tights are your best running companions ever. Safety pocket at back keeps your keys and small valuables safe. Reflective details ensure safety and visibility. Light outer shell ensures maximum comfort. Amazing detachable shorts can be used in a modular form like none other.