1.Fabric deterioration 
Sweat is toxic. On some individuals it's more, on others it's less. The phenomenon occurs because of bacterial attack. Due to their performance nature. In order to minimize this problem, we recommend you water rinse the garment after each ride. Also, never store the garment moist or in a closed environment like a plastic bag.
Do not hang the garments in the direct sunlight.
Do not use bleachers and/or softeners. Use a mild liquid detergent only.
Dry garments flat or hanging, but do not tumble dry.

2. Fabric piling does not occur by itself. It always is the result of abrasion.
Do not use embroidered saddles.
Make sure the Velcro fastener of the saddle pocket does not touch the shorts
Do not wash together with gloves, bags, rain jackets, etc. because of the Velcro straps!