Curl definition

Waves and curls that fall flat or separate into fuzz instead of clumping.

Definition is curls clumping together and staying that way as they dry. It takes enough water in the hair, a film-former to hold the clump, and a technique that does not break it up.

What is happening

A curl is a clump of strands that follow the same spiral. Definition fails when strands separate, which happens when the hair is too dry to clump, when the cuticle is rough enough to catch on its neighbours, or when the clump is broken by touching, towelling or brushing as it dries.

Low-porosity curls often fall flat because heavy creams coat them without adding water; high-porosity curls frizz because they lose water before the clump sets.

What helps

1. 1. Style on soaking-wet hairApply products to dripping hair in the shower or over the sink. Water is the first styling product.
2. 2. Use a film-formerFlaxseed gel or a light curl gel dries into a thin film that holds the clump. Scrunch out the cast once dry.
3. 3. Lighter for low porosity, richer for highAloe- and panthenol-based leave-ins for fine or low-porosity curls; a cream with shea plus a little protein for high-porosity coils.
4. 4. Hands off while dryingDiffuse on low or air-dry without touching. Most frizz is created in the last ten minutes of drying.

Ingredients to look for

• Flaxseed (linseed) gelNatural film-former for curl definition
• Aloe veraLightweight humectant and scalp soother
• PanthenolPro-vitamin B5 humectant
• Shea butterOcclusive butter that seals moisture in
• Hydrolyzed quinoa proteinFilm-forming protein for strength
• GlycerinHumectant that pulls water from the air

Worth avoiding

• Brushing dry curls
• Heavy butters on fine, wavy hair
• Rubbing with a towel

Educational only, not medical advice. Persistent scalp irritation, sudden hair loss or unexplained breakage warrant a visit to a dermatologist. Written by Cosmixxology R&D.