Have you lost your track pant?

Intrigue created by an abandoned track pant.

This track pant was seen abandoned near the bushes, in the park. Doesn't it intrigue you?

How could somebody leave a track pant behind? 

Did he/she walked out of park in under-clothes?
But it is too large to be belonging to any she. A definite 'he'.

Or was it a spare track pant? 

But why then is it unfurled on the ground? It should have been folded and packed.

So many questions. Alas, we have to live with the mystery.