ASTRA

Precision Curl Definer · Define System

Product Overview

Astra Curl Definer is a high-definition styling cream designed to shape, set, and refine textured hair with clarity and polish. Its formula delivers intentional structure while preserving movement, comfort, and a refined surface finish.


Astra supports curl formation with a controlled set that dries into a flexible, touch-aware film — allowing styles to hold their shape while remaining wearable and expressive throughout the day.

Defined by Science

Astra applies smoothly and distributes evenly through damp hair, offering immediate slip and control during styling. As hair dries, definition becomes more pronounced, forming a cohesive curl pattern with a polished appearance and controlled elasticity.


The finish is firm yet responsive, supporting styles that require longevity, refinement, and visual clarity without sacrificing comfort or manageability.


What you'll notice:


  • Clear, sculpted curl definition
  • Controlled shape with responsive flexibility
  • A refined surface finish with soft luminosity
  • Styles that maintain integrity without feeling rigid

Guided by Nature

Astra's performance is supported by a refined blend of conditioning butters, lightweight esters, and botanical actives chosen to balance structure with comfort.

Mango Butter & Shea Butter
Provide cushion and pliability, helping maintain comfort and flexibility as definition sets.


Squalane & Meadowfoam Seed Oil
Contribute lightweight nourishment and surface smoothness without adding heaviness.


Snow Mushroom Extract & Aloe Vera Juice
Support hydration balance, helping curls retain elasticity and softness during wear.


Baobab & Quinoa Proteins
Reinforce curl structure and resilience, supporting shape retention over time.


Green Tea, Nettle & Horsetail Extracts
Offer antioxidant and strengthening support to the scalp and strands, aligning with long-term hair vitality.

Balanced by Design

Astra Curl Definer is for anyone seeking intentional curl definition with a refined, long-lasting finish.


It's ideal for:


  • Styles that benefit from structure and clarity
  • Textures that respond well to controlled hold
  • Wearers who want definition that looks polished and intentional
  • Those who prefer a styling product that performs without the need for layering

A defined, polished finish with controlled flexibility and visual clarity. Curls appear sculpted, intentional, and refined — maintaining comfort throughout wear.

How to Use

  • Apply to clean, damp hair.
  • Distribute evenly using hands or a styling tool, then shape curls as desired.
  • Allow hair to air-dry or diffuse for enhanced definition and hold.
  • Astra is designed to perform as a complete styling step.

Part of the Define System

Astra Curl Definer is part of the Sizigē Define System, a collection focused on shaping, refining, and enhancing natural pattern expression with precision and balance.

Ingredients (INCI)

Aqua (Water), Aloe Barbadensis Leaf Juice, Maltodextrin/VP Copolymer, VP/VA Copolymer, PVP, Mangifera Indica (Mango) Seed Butter, C12-15 Alkyl Benzoate, Propanediol, Polysorbate 20, Behentrimonium Methosulfate (and) Cetyl Alcohol (and) Butylene Glycol, Olive Oil PEG-7 Esters, PEG-6 Caprylic/Capric Glycerides, Butyrospermum Parkii (Shea) Butter, PEG-7 Glyceryl Cocoate, Squalane, Cyclopentasiloxane, Ricinus Communis (Castor) Seed Oil, Polyquaternium-10, Carbomer, Hydrolyzed Adansonia Digitata Seed Protein, Hydrolyzed Chenopodium Quinoa Protein, Guar Hydroxypropyltrimonium Chloride, Hydroxyethylcellulose, Camellia Sinensis Leaf Extract, Myrciaria Dubia Fruit Extract, Urtica Dioica Extract, Equisetum Arvense Extract, Triethanolamine, Hydroxypropyl Cyclodextrin, Tremella Fuciformis Extract, Serenoa Serrulata Fruit Extract, PEG-40 Hydrogenated Castor Oil, Di-PPG-2 Myreth-10 Adipate, Limnanthes Alba (Meadowfoam) Seed Oil, Olea Europaea (Olive) Squalane, Saccharomyces/Bamboo Ferment, Pisum Sativum (Pea) Peptide, Copper Tripeptide-1, Phenoxyethanol, Ethylhexylglycerin, Parfum (Fragrance).