The mendil is a traditional Algiers headscarf, worn tied as a turban or draped over the shoulders depending on the occasion. It's a piece that requires a little thought to match well with the rest of the outfit. Here are the criteria to keep in mind.
Color, first and foremost
The mendil is generally chosen based on the color of the karakou or the outfit worn: either in a matching tone for a harmonious effect, or in a contrasting color to make the outfit stand out. Gold or warm-toned mendils easily match most karakous, while more colorful models allow for playing with contrasts.
Material and drape
A mendil that is too stiff will be more difficult to tie neatly into a turban; a fabric that is too thin risks slipping. Materials with a good drape (silk, satin, or blend) are generally easier to work with to achieve a neat turban, especially if it's your first time.
How to tie it
Tying it as a turban is the most traditional way to wear the mendil: the fabric is wrapped around the head then secured with pins, sometimes adorned with a head jewel on top for more hold and sparkle. For a less formal occasion, the mendil can also simply be draped over the shoulders or tied more loosely, as an accessory rather than a headdress.
Tip: if you are not comfortable tying a turban, practice a few days before the event, or ask someone you know who is used to doing it to help you on the day.