الهدوم الفاتحة والغامقة لسه مبلولة ومكرمشة.

Because Arabic usually leaves out the present-tense verb to be.

So a sentence like:

الهدوم ... مبلولة

literally looks like the clothes ... wet, but it means the clothes are wet.

This is normal in both Egyptian Arabic and Standard Arabic. If you wanted was/were or will be, then Arabic would use a verb.

Here, لسه means still.

So:

لسه مبلولة ومكرمشة
= still wet and wrinkled

In other situations, لسه can also mean yet, especially in negatives and questions, but in this sentence still is the right idea.

Because in Arabic, adjectives normally come after the noun they describe.

So:

• الهدوم الفاتحة = the light-colored clothes
• literally: the clothes the-light

That is the normal Arabic word order.

Because they are adjectives directly describing the definite noun الهدوم.

In Arabic, adjectives that modify a noun must match it in definiteness. Since the noun is الهدوم (the clothes), the adjectives must also be definite:

• الهدوم الفاتحة
• والغامقة

The و just means and. It does not remove the ال-. So والغامقة is still definite: and the dark [ones].

Because الهدوم is a non-human plural, and Arabic normally treats non-human plurals as feminine singular for agreement.

That is why you get:

• الفاتحة
• الغامقة
• مبلولة
• مكرمشة

This may feel strange to English speakers, but it is a very common Arabic pattern.

Because they are not part of the noun phrase the light and dark clothes. They are the predicate of the sentence: they tell you the state of the clothes.

So the structure is roughly:

• الهدوم الفاتحة والغامقة = the subject
• لسه مبلولة ومكرمشة = what is being said about them

Predicate adjectives in Arabic are usually indefinite, so they normally do not take ال-.

Yes, exactly.

It is basically a compact way of saying:

the light clothes and the dark clothes

Arabic often avoids repeating the noun when it is already clear. So repeating الهدوم would be possible, but the version in the sentence is more natural and less repetitive.

It is very common in Egyptian Arabic, yes. مكرمشة means wrinkled, crumpled, or creased.

It comes from the colloquial verb كرمش. In more formal Standard Arabic, you might see a different word, such as مجعّدة, depending on the context.

So مكرمشة is a good everyday Egyptian word to know.