What would cause the brown leaves? They are very dry or has it died? I have two plants and the other one looks much better, fuller and greener with very little browning.
I believe your Breeze Lomandra is root bound and is lacking moisture.
This evergreen perennial herb will grow to about 12 to 24inches tall and wide. It should be planted in the ground or given a larger pot to spread it's root system.
Potted plant will need daily water and even twice daily if temperatures are above 85 degrees F.
A full sun or moderate shade location is required.