Fibeglass planter is durable. It is extremely lightweight and meet weight restrictions. Fiberglass planter is weather resistant, resistant to UV exposure, and most importantly, frost resistant. Fiberglass is strong enough to withstand the elements without succumbing to rust, losing its color, cracking, drying out, or shattering. The strength of this material allows you to leave your fiberglass planter out in the rain and snow, and brightest sunny days of Summer.