Aer Sling Bag 2

My gym buddy and I meet most evenings at the gym: I arrive in my gym gear with nothing more than a bottle of water and a towel whereas my friend comes straight from work, although you could be forgiven for thinking she just jumped off a long-haul flight by the number of bags she brings. The issue she faces is that she needs carry both her work stuff and gym gear without either coming into contact on the way home. Neither sweaty gym shoes nor laptop should ever know the other exists!