The MSR MicroMesh Maintenance Kit contains 6 micromesh patches. These patches are used to repair mesh windows and no-see-um netting. Application is easy. Peel off the paper backing, and apply it to the fabric. Repeat as neccessary. MSR Tents are made to be tough, but accidents do happen. In case they do, don't let your trip be ruined by insects flying into open mesh holes. Keep them out with the MSR MicroMesh Maintenance Kit.