Laundry detergent economy is more efficient if your bottom-layer clothing items have lower mass. You can fit more short-sleeve shirts in the washer than long-sleeve shirts. So it’s better to have thin, short-sleeve t-shirts as the bottom layer and thick sweatshirts for the outer layer.
Laundry detergent economy is more efficient if your bottom-layer clothing items have lower mass. You can fit more short-sleeve shirts in the washer than long-sleeve shirts. So it’s better to have thin, short-sleeve t-shirts as the bottom layer and thick sweatshirts for the outer layer.