A balm has a similarly creamy consistency to a moisturizer. The two product types differ primarily in that moisturizers have a higher water/moisture content, which hydrates the skin alongside serums and toners, while balms have a higher (plant) oil content, which protects the skin from TEW (transepidermal water loss).
All balms that you find in this category contain pure, natural ingredients, many of which are purely plant-based.