A sketch comedy group has made a video sending up the current craze of wearing running leggings for everything.
Skitbox recommend tight and stretchy sportswear for buying groceries, going shopping, resting a hangover, and showing off your baby.
But Skitbox are on the money - according to Fortune, companies like Nike and Under Armour experienced a double-digit rise in sales last year.
Meanwhile, established denim companies like Levis are known to be worried about the move away from jeans for leisure wear, to sports leggings and tops.
The trend coincides with a huge increase in the number of people running and cycling.