Preserved foliage and flowers are natural stems that have been treated and often coloured.
Stem shapes can vary just as with any natural product.
Keep away from sudden temperature changes and changes in humidity. Stems can react to these changes by sweating and they are not colourfast, so please keep away from surfaces where they could cause staining.
Do not clean stems with water, just lightly dust.
Chemicals used in the preserving process are non toxic but sometimes certain products can produce an odour.