Fleeces and hessian are also commonly used in the UK to protect palm trees over winter.
However, if winter damage occurs, the damaged growth should be removed in the spring, and the plants should be tended carefully and fertilised to maintain good health. Keep an eye on the weather forecast in the winter. Old style christmas lights can be wrapped around a tree to provide extra insulation. I have a queen palm i wrap a heated cable around in bad winters. Any trees that are tender that are in pots may require bubble wrap around the pots to insulate the roots.