Mon gilet en laine est chaud, mais cet imperméable est plus pratique quand il pleut.

Mon means my, so it shows possession. French normally uses a possessive adjective the same way English does here.

Also, mon agrees with the noun gilet, not with the owner. Since gilet is masculine singular, French uses mon.

Compare:

• mon gilet = my cardigan / my vest
• ma veste = my jacket
• mes manteaux = my coats

En + material is a very common way to say what something is made of.

So:

• un gilet en laine = a wool cardigan
• une veste en cuir = a leather jacket
• un pull en coton = a cotton sweater

In this sentence, en laine describes the material of the gilet.

In French, many adjectives come after the noun. Chaud is normally placed after the noun, so un gilet chaud is the usual order.

English often puts adjectives before the noun, but French frequently puts them after:

• un manteau chaud
• une veste pratique
• un pull rouge

So gilet chaud follows a normal French pattern.

French adjectives agree with the noun they describe in gender and number.

Here:

• gilet is masculine singular, so French uses chaud
• imperméable is masculine singular, so French uses pratique

A useful detail: pratique has the same form in masculine and feminine singular, so you do not see a spelling change there.

For example:

• masculine singular: un gilet chaud
• feminine singular: une veste chaude
• masculine or feminine singular: pratique
• plural: pratiques

French uses cet before a masculine singular noun that begins with a vowel sound or a silent h.

So:

• ce gilet
• cet imperméable
• cet hôtel

This change makes pronunciation smoother. Ce imperméable would sound awkward, so French changes ce to cet.

Here, imperméable is a noun. It means raincoat.

But imperméable can also be an adjective meaning waterproof:

• un imperméable = a raincoat
• une veste imperméable = a waterproof jacket

So this is a good example of a French word that can belong to more than one word class depending on the sentence.

Plus + adjective is the normal way to make a comparative in French.

So:

• pratique = practical
• plus pratique = more practical

Other examples:

• plus chaud = warmer
• plus léger = lighter
• plus élégant = more elegant

It works very much like English more + adjective.

You only need que when the second part of the comparison is stated explicitly.

In this sentence, the comparison is understood from context: the raincoat is being compared with the wool cardigan.

So French can simply say:

• cet imperméable est plus pratique quand il pleut

If you wanted to make the comparison fully explicit, you could say:

• Cet imperméable est plus pratique que mon gilet quand il pleut.

In weather expressions, French uses an impersonal il. It does not refer to a person or thing; it is just the grammatical subject required by the verb.

So:

• il pleut = it is raining
• il neige = it is snowing
• il fait froid = it is cold

This is similar to English it rains or it is raining, where it also does not refer to anything specific.

In this sentence, plus is usually pronounced with a silent final s, so it sounds roughly like plu pratique.

A helpful rule:

• before a consonant, the s in comparative plus is often silent
• before a vowel sound, you may hear it pronounced as a z in liaison

For example:

• plus pratique → final s usually silent
• plus utile → you may hear pluz utile

So the written form stays plus, but the pronunciation changes depending on what follows.