the environmental impact of fashion also depends on how much and how long a garment is used. typically, a garment used daily over years has less impact than a garment used once to then be quickly discarded. studies have shown that the washing and drying process for pair of classic jeans is responsible for almost two-thirds of the energy consumed through the whole of the jeans' life, and for underwear about 80% of total energy use comes from laundry processes. thus, use and wear practices affect the lifecycles of garments and needs to be addressed for larger systemic impact.