Learn French: Ces chaussures sont très différentes.

Ces is the plural form of "this" or "that" (meaning "these" or "those"). Because chaussures (shoes) is plural, we use ces. In French, ces is used for all plural nouns, whether they are masculine or feminine.

Why does différentes end in -es?

In French, describing words (adjectives) have to match the gender and number of the noun they describe. The word for shoe (une chaussure) is feminine, and here there is more than one. So, we take the base masculine word différent, add an -e because it is feminine, and an -s because it is plural.

Do I pronounce the -es at the end of différentes?

No, the -es itself is silent, but it changes how the end of the word sounds! In the masculine form (différent), the final -t is silent. By adding the feminine -e to make différentes, that -t is "woken up" and you must pronounce it.

Why do we use sont instead of est?