Hot tools are the fastest route to visible breakage, pigment loss, and fried ends. Salon colour clients often ask us why their hair started looking dull six weeks after the appointment — nine times out of ten, it is because they are curling or flat-ironing every morning. The fix is not to stop styling. It is to swap in a few heatless methods that give you the same texture, same bounce, and in some cases longer-lasting results than a curling iron would. These are the techniques our colourists use on their own hair and the ones we send our clients home with.

The overnight robe-tie wrap

This is the method that went viral on TikTok for a reason — it actually works, and it works especially well on medium-to-long hair. You need a long fabric tie (a satin robe belt is ideal, but a rolled-up T-shirt works in a pinch), damp but not wet hair, and about three minutes before bed. Centre the tie on top of your head, bring one section of damp hair around each side, and wrap alternating sections around the tie all the way down. Secure at the ends with a small scrunchie. Sleep on it. In the morning, unwrap and gently separate — you will have soft, voluminous waves that last through a full day.

Two adjustments matter. First, the hair needs to be damp, not soaking — too wet and it does not dry overnight; too dry and the curl will not set. Spritz with a little water if hair has already dried. Second, use a small amount of mousse or curl cream before wrapping, which gives the curl hold without needing hairspray in the morning.

Flexi rods or foam rollers for tighter curls

For a tighter, more defined curl pattern, flexi rods are the best heatless option on the market. They are bendable foam tubes that twist onto hair and hold the shape while it dries. Section damp hair into 1- to 2-inch pieces, roll each section onto a rod, and bend the ends of the rod to secure. Leave in overnight or until hair is fully dry. Removing carefully gives you polished, spiral-style curls that hold for 2 to 3 days if your hair dried completely.

Foam rollers work similarly but sit closer to the scalp, making them better for a softer, round-brush-style curl rather than spirals. Both options cost around $20 for a full kit and last years.

The braid method for beach waves

This is the easiest method on the list and the one most people already know. French-braid or three-strand-braid damp hair into two braids, one on each side of the head. Sleep in them. Take them out in the morning and shake with your fingers. You get loose, lived-in waves that read as effortless rather than set. For tighter waves, use more, smaller braids. For looser waves, use two larger ones. This method pairs well with a salt spray for more texture, or a smoothing cream for more polished waves.

Air-dry technique: the one most people skip

The most underrated heatless styling tool is a proper air-dry routine. Applied to wet hair in the right order, a styling cream + mousse + gel combination can set a natural wave or curl that rivals what a curling iron produces — with zero heat and longer-lasting results. The sequence matters: leave-in conditioner first (detangles and protects), then a curl cream or mousse (defines shape), then a light gel on the mid-lengths and ends (locks the shape while drying). Do not touch the hair again until it is fully dry, then scrunch out any crunch with a drop of oil. The first few tries take experimentation; once you find the right product order for your texture, this becomes a 5-minute routine.

How to keep the curl overnight

A silk or satin pillowcase preserves any curl set, heatless or otherwise, by up to three days. Cotton pillowcases pull moisture out of the hair and create friction that breaks curl pattern overnight — which is why so many people wake up with one side of their hair flat. If you cannot commit to replacing your pillowcase, a silk bonnet or a loose silk scrunchie pineapple at the crown protects the curls while you sleep. The upgrade from cotton to silk is the single most-overlooked piece of a low-maintenance hair routine.