How to understand the sentence that pine and cypress wear thick and shiny clothes?

The sentence "pine and cypress wear thick and bright clothes" can be understood as:

Pines and cypresses may grow in a cold environment and need to wear thick clothes (that is, their needles) to keep warm. These needles are shiny and can provide additional waterproof and heat insulation effects. This is an adaptation to their growing environment.

At the same time, this description is also a vivid description of the winter scenery, which makes readers feel the cold atmosphere in winter more intuitively.