The MSR Shelter Wash & Restore System is designed for regular tent maintenance and will improve the performance of your tent and extend the life of the fabrics significantly. This simple, two-step system cleans your tent's fabric, reduces the odors caused by mildew and general use, and restores the water repellent finish. Each package contains one bottle of tent washing solution and one bottle of DWR restoring formula. Both solutions are water-soluble and safe for use with any tent fabric.