A big market for Yogis today is the Yoga clothing market where many people are told to buy special Yogic clothes like yoga pants, Yoga shorts, Yoga underwear etc., which have become a very essential part of all Yoga conferences and seminars. But actually, when we go back to the history we see that Yogis were practicing Yoga in their normal clothes of that time.
The normal clothes of those times were dhotis which were very traditional Indian cloth and that is what they were wearing. This was like pants for us now. Yogis were not actually going shopping to buy some special pants for Yoga or special clothes for Yoga, but they practiced with what they had.
In the 1950s Acarya T. Krishnamacharya wrote an article on this topic of why Yoga is in fact the most accessible ways for practicing for the main public. In this he describes that one of the reasons is that it is very economical, no need to buy extra clothing, no need to by extra equipment etc. In fact references on this can also be found in his first book the “Yogamakaranta” which he wrote in 1934.
If you look at all this Yoga actually does not require not just extra clothing but extra equipment like crops and all those kinds of things. The Yogis were very practical and used what was available. There is no need to buy anything additional to practice Yoga. The only investment that we need to practice is “time”.