Approximately 35% of microplastics in the environment originate from synthetic textiles. These microplastic particles also come from tire abrasion, fishing nets, abrasives, and clothing textiles. A significant portion of these clothing fibres enter the environment through the washing of textiles. Between 30 and 50% of clothing textiles are made from synthetic fibers such as polyester. Each person washes between 200 and 300 kg of textiles annually. In addition to the environmental impact of microplastics, the longevity of textiles, which is influenced by washing, plays a crucial role. Optimized washing settings can extend the lifespan of textiles and reduce their damage, contributing to the sustainability of clothing. The amount of fibre loss depends on the textile's properties, such as strength, pilling tendency, and abrasion resistance. Various factors during the washing process cause textiles to lose fibers, leading to textile damage. This study aims to determine the fibre loss of textiles under different washing settings. It examines whether changes occur over five washing cycles. The experimental parameters include the form of detergent (powder or liquid) and spin speed (600 or 1000 RPM). Additionally, abrasion resistance and pilling behavior are investigated.