Advices and Queries 41 says:
Try to live simply. A simple lifestyle freely chosen is a source of strength. Do not be persuaded into buying what you do not need or cannot afford. Do you keep yourself informed about the effects your style of living is having on the global economy and environment?
Quakers are concerned about the excesses and unfairness of our consumer society, and the unsustainable use of natural resources. We try to live simply and to give space for the things that really matter: the people around us, the natural world, our experience of God. (from the leaflet: Living What We Believe- Quaker testimonies: a way of living faithfully)
This is one of the main reasons that plain clothes work for me--not being fussed about what I wear as it is the same every day--dress, apron, shawl, mob cap--leaves me infinite room to serve my fellow travellers who tread upon this earth with me, drink in the glory of the natural world and spend time in the warm Light that is God’s love.