How to Read Fabric Labels on Preloved Clothing (And Why It Matters)

When you're shopping preloved, the label inside a garment tells you far more than the brand name. Fabric content is one of the most important — and most overlooked — pieces of information for any considered buyer. Understanding what a dress is made from helps you assess its quality, longevity, care requirements, and true value.

Here's how to decode fabric labels like a pro.

Why Fabric Content Matters for Preloved Fashion

A garment's fabric composition directly affects how it ages, how it feels, and how long it will last. Natural fibres like silk, wool, and cotton tend to improve with careful wear and age gracefully. Synthetic blends can pill, lose shape, or degrade over time — which is why a 100% silk dress from twenty years ago can still feel extraordinary, while a polyester piece from five years ago may already look tired.

When buying preloved, fabric content is your shortcut to understanding whether a piece is worth its price — and how to care for it once it's yours.

The Fibres Worth Knowing

Silk

The gold standard for occasion wear. Silk is naturally temperature-regulating, lustrous, and drapes beautifully. Look for 100% silk or high-percentage silk blends. On a label, it may appear as soie (French) or seta (Italian) on European designer pieces. Silk requires gentle hand-washing or dry cleaning — but treated well, it lasts decades.

Wool and Cashmere

Exceptional insulators with natural elasticity. Wool holds its shape well and resists wrinkles — ideal for structured coats and tailored pieces. Cashmere is a finer, softer variant; even a small cashmere percentage (30% or more) noticeably improves the hand-feel of a garment. Look for laine (wool in French) or cachemire on European labels.

Cotton and Linen

Breathable, durable, and easy to care for. High-quality cotton — particularly Egyptian or Pima cotton — has a noticeably smoother, heavier feel than standard cotton. Linen wrinkles easily but softens beautifully with each wash, making preloved linen pieces often better than new ones.

Viscose and Tencel (Lyocell)

Semi-synthetic fibres made from plant cellulose. Viscose drapes like silk but requires more careful handling — it can shrink or distort when wet. Tencel is a more sustainable, more durable alternative with a similar soft drape. Both are common in contemporary designer pieces and are generally good-quality choices in preloved garments.

Polyester and Nylon

Not all synthetics are equal. High-quality polyester — particularly in structured or technical garments — can be durable and easy to care for. However, in occasion wear, a high polyester content often signals a lower price point. If you're assessing a piece for longevity, check whether the polyester is the primary fibre or a small percentage added for structure.

How to Read a Fabric Label

EU regulations require garments sold in Europe to list all fibres present at 80% or more by weight, and any fibre present at 5% or more. Fibres are listed in descending order — so the first fibre listed is the dominant one.

A label reading 78% Silk, 22% Elastane tells you the garment is primarily silk with a small amount of stretch fibre added — a common and desirable combination in fitted dresses. A label reading 55% Polyester, 45% Viscose tells a different story.

On vintage pieces — particularly those made before the 1970s — labels may be absent or incomplete. In these cases, a simple burn test (performed carefully on a loose thread) can help identify natural versus synthetic fibres: natural fibres burn cleanly and smell like burning hair or paper; synthetics melt and smell chemical.

Fabric Content and Care

Once you know what a garment is made from, caring for it becomes straightforward:

• Silk: Hand-wash in cool water with a gentle detergent, or dry clean. Never wring. Dry flat or hang away from direct sunlight.
• Wool and cashmere: Hand-wash in cool water or dry clean. Lay flat to dry to preserve shape. Store folded, not hung, to prevent stretching.
• Cotton and linen: Machine-washable in most cases. Wash at 30–40°C to prevent shrinkage. Iron while slightly damp for best results.
• Viscose: Hand-wash only in cool water. Do not wring or tumble dry. Reshape while damp.
• Tencel: Gentle machine wash on a delicate cycle. Tumble dry on low or hang to dry.

What to Look for When Shopping Preloved

When assessing a preloved piece, check the label before anything else. Ask yourself:

• Is the primary fibre natural or synthetic?
• Does the fabric content match the price point being asked?
• Are there any signs of fabric fatigue — pilling, thinning, or loss of lustre — that suggest the fibre has reached the end of its life?

A well-made garment in a quality fabric, even with some wear, will almost always outlast a newer piece in a lesser material. That's the quiet logic of circular fashion — and why fabric content is the first thing worth understanding.

At Circular Dress Collaborative, every piece in our collection is assessed for fabric quality, condition, and longevity before it reaches you. Browse our current arrivals to find pieces worth keeping.