What is rPET Fleece? The Complete Guide for Apparel Brands

Published September 5, 2026 · 9 min read · By Kaiji Textile Team

rPET Fleece in One Paragraph

rPET fleece is a soft, warm, brushed knit fabric made from recycled polyethylene terephthalate — the same plastic used in water bottles and food packaging. Discarded PET is collected, cleaned, and melted into chips, then spun into new polyester yarn and knitted into fleece. The result looks, feels, and performs like virgin polyester fleece, but with a dramatically smaller environmental footprint — and it carries certifications (like GRS) that consumers and retailers increasingly demand.

For apparel brands, rPET fleece is no longer a niche "eco option." It is becoming the default fabric for polar, sherpa, and performance fleece lines across the USA and Europe.

How rPET Fleece Is Made: From Bottle to Bolt

Understanding the process helps you talk credibly with suppliers — and with your own customers. Here is the full chain:

1. Collection & sorting — post-consumer PET bottles and post-industrial polyester waste are collected and sorted by color and polymer grade.
2. Cleaning & flaking — bottles are washed, labels removed, and shredded into clean PET flakes.
3. Melting & pelletizing — flakes are melted and extruded into rPET chips (pellets) — the raw material.
4. Yarn spinning — chips are melted again and spun into recycled polyester filament or staple fiber yarn.
5. Knitting — yarn is circular-knitted into grey fleece fabric.
6. Dyeing & finishing — the fabric is dyed, then brushed/napped to create that soft raised pile surface.
7. Testing & certification — quality inspection, color fastness testing, and GRS chain-of-custody documentation.

What "GSR" / "GRS Certified" Actually Means

You will see GRS (Global Recycled Standard) on many rPET fleece products. GRS is a third-party certification that verifies:

• Recycled content — the actual percentage of recycled material in the product (typically 20–100%).
• Chain of custody — every step from recycler to mill to garment is tracked and audited.
• Social & environmental practices — mills must meet labor, chemical, and environmental standards.
• Traceability — a transaction certificate (TC) accompanies each shipment so your brand can claim "recycled" credibly.

If you plan to market your fleece products as "recycled" or "sustainable," a GRS-certified supply chain is the safest way to do it — it protects you from greenwashing claims and is increasingly required by major retailers.

rPET vs Virgin Polyester Fleece: What's the Difference?

Aspect	Virgin Polyester Fleece	rPET Fleece
Feel & warmth	Soft, warm, consistent	Virtually identical
Carbon footprint	Higher (oil-based raw material)	~30–50% lower CO₂ emissions
Water usage	Higher	Significantly lower
Certifications	—	GRS, OEKO-TEX options
Cost	Baseline	Comparable (often within 5–10%)
Marketing story	—	"Made from recycled bottles" — real consumer pull

Common rPET Fleece Types & GSM Weights

"Fleece" is a family of fabrics. Know which one fits your product:

Type	Typical GSM	Best For
Polar Fleece	150–300	Jackets, hoodies, mid-layers — versatile everyday warmth
Sherpa / Teddy Fleece	300–600	Coat linings, blankets, reversible outerwear — max warmth, wool-like texture
Coral Fleece	200–350	Blankets, loungewear, baby products — ultra-soft, plush hand feel
Performance Fleece	200–350	Activewear, athleisure — moisture-wicking, stretch, durability

Not sure which fleece suits your collection? Read our comparison: Polar Fleece vs Sherpa Fleece — Which to Choose.

6 Reasons Brands Are Switching to rPET Fleece

1. Consumer demand is real and growing

A majority of US consumers now say eco-certified textiles influence their purchase decisions — and the share is rising every year. "Recycled" is one of the easiest claims to communicate on a hang tag.

2. Retailer requirements

Major US and EU retailers are adding recycled-content targets to their vendor scorecards. Sourcing rPET now positions your brand ahead of these requirements instead of playing catch-up.

3. Better margin story

Sustainable products consistently command a price premium at retail. With rPET costing close to virgin, the extra margin largely goes to your bottom line.

4. Lower environmental footprint

rPET uses less energy, less water, and fewer virgin resources than virgin polyester — a claim you can back with data from your GRS Transaction Certificate.

5. No quality compromise

Modern rPET fleece matches virgin polyester on softness, warmth, color fastness, and durability — when sourced from a quality mill.

6. Flexible MOQs unlock new brands

Keqiao's mid-size mills (and partners like Kaiji Textile) offer 500m MOQs and 1-roll trial orders — so emerging brands can test rPET fleece without committing to a container.

How to Choose the Right rPET Fleece Supplier

• Verify GRS certification — ask for the certificate and a sample Transaction Certificate.
• Request physical swatches — feel the hand, check the pile, test color. Never buy on photos alone.
• Check MOQ flexibility — can they do a 1-roll trial? What's the per-color MOQ?
• Confirm lead times — standard production is 15–20 days; air freight 5–7 days to the USA.
• Test communication — do they respond in hours? Do they understand US HTS codes and customs paperwork?
• Ask for documentation — GRS TC, test reports (OEKO-TEX, color fastness), and inspection photos.

Common Questions About rPET Fleece

Is rPET fleece as warm as regular fleece?

Yes. Warmth comes from the fabric's structure and GSM, not from whether the polyester is recycled. A 300 GSM rPET sherpa is just as warm as a virgin sherpa of the same weight.

Is rPET fleece itchy?

No — the brushed pile surface is soft against skin. Quality varies by mill, so always sample first.

How many bottles are in a fleece hoodie?

Roughly 7–10 single-use PET bottles are recycled into a typical fleece hoodie — a concrete, powerful stat for your product page.

Does rPET fleece pill more?

Not inherently. Pilling depends on yarn quality, knitting structure, and finishing. A reputable mill tests pilling resistance (e.g., Martindale) before shipping.

The Bottom Line

rPET fleece is the present — and future — of the fleece market. It delivers everything brands love about fleece, minus the environmental guilt, plus a story consumers actually care about. With GRS-certified options and low MOQs now available from Keqiao, there has never been a better time for small and mid-size US brands to make the switch.