The pots are made of concrete in a nice grey tone. These pots are ideal for creating an atmospheric environment in your outdoor space. Fill the pots with plants that suit your style. Look for simple grasses for a modern and simple look. Or choose geranium flowers in rose shades if you want a more classic look. The pots weight may vary due to the material. The pots are frost-proof and you will find holes in the bottom to make sure that the water drains when it rains. Pots come in three sizes: Small, Medium, Large.