Non-Woven vs Paper vs Plastic Bags: An Honest Comparison

Key takeaways

Reuse decides which bag is greener: a non-woven bag needs about 11 uses to beat a single-use polythene bag on climate impact.
Paper bags need several uses to beat polythene and tear easily when wet.
Since 1 November 2025, traders in Sri Lanka must charge for polythene bags with handles.
Polypropylene is recyclable where facilities exist; single-material bags are easiest to recycle.
The best strategy is a strong, attractive, branded bag that customers keep and reuse.

Introduction

For decades, the thin polythene carrier bag was the default at shop counters across Sri Lanka. It was cheap, light and given away free. Today that is changing. Thin polythene has been banned, traders must now charge for polythene bags with handles, and shoppers increasingly bring their own bags. Businesses are asking which bag they should offer instead: paper, non-woven or a thicker plastic bag?

There is no single perfect bag. Each option has strengths and weaknesses in strength, cost, branding and environmental impact. And the environmental story is more complicated than it first appears: a reusable bag is only better for the planet if it is actually reused.

As bag makers, we want to give an honest comparison. This article compares non-woven, paper and polythene bags on practical performance, cost, branding and environmental impact, explains what life cycle studies say about reuse, summarises Sri Lanka’s rules on polythene and offers practical advice for shops and brands. It ends with an illustrative example and answers to common questions.

The three contenders

Polythene carrier bags

Thin plastic carrier bags are usually made from high-density polyethylene (HDPE), sometimes low-density polyethylene (LDPE). They are very light, cheap, waterproof and strong for their weight. Most are used once, or reused once as a bin liner, then thrown away. Thin polythene is easily blown into drains, waterways and the sea, where it persists for a very long time.

Paper bags

Paper bags are made from wood pulp, often with recycled content. They are stiff, print well and are widely recyclable and biodegradable. But they are heavier than plastic bags, tear easily when wet, and making paper uses significant amounts of energy, water and raw material. Most paper bags are used once or only a few times.

Non-woven bags

Non-woven bags are made from polypropylene fibres bonded into a fabric-like sheet. They are strong, light, water-resistant, foldable and designed to be reused many times. They print well, especially when laminated, and are made in many styles, from simple D-cut bags to stitched bags that carry up to 20 kg. Polypropylene is recyclable where collection and recycling facilities exist.

Practical comparison

Factor	Polythene carrier	Paper bag	Non-woven bag
Strength	Good for its weight; handles can stretch	Moderate; weak when wet	Good to very high, depending on GSM and construction
Water resistance	Waterproof	Poor	Good; laminated bags are water-resistant
Reusability	Low; usually single use	Low to moderate	High; designed for many uses
Weight	Very light	Heavier	Light to moderate
Folds flat for carrying	Yes	Not easily	Yes
Branding quality	Basic	Good	Very good; photographic when laminated
Unit cost	Lowest	Moderate	Higher per bag, lower per use
Recycling	Possible but often not collected	Widely recyclable	Recyclable where facilities exist
Litter risk	High	Moderate; breaks down	Lower, because bags are kept and reused

What life cycle studies say

The fairest way to compare bags is a life cycle assessment, which looks at the environmental impact of a bag from raw materials to disposal.

One of the best-known studies, published by the UK Environment Agency in 2011, compared supermarket carrier bags by their global warming potential. It found that, compared with a conventional HDPE carrier bag used once, other bags must be reused several times to have a lower impact on climate change:

Bag type	Uses needed to match a single-use HDPE carrier (climate impact)
Paper bag	About 3
Heavier LDPE “bag for life”	About 4
Non-woven polypropylene bag	About 11
Cotton bag	About 131

The figures increase if the HDPE bag is reused as a bin liner. Other studies, which look at many more environmental impacts, such as water use and pollution, have found that reusable bags need even more uses to come out ahead.

What do these numbers mean in practice?

Reuse is everything. A non-woven bag used once is worse than a polythene bag used once. A non-woven bag used weekly for a year is much better.
Paper is not automatically green. Paper needs to be reused several times to beat a polythene bag on climate impact, and it rarely survives that many trips.
Non-woven bags are easy to reuse many times. Their strength, water resistance and foldability make 11 or more uses realistic for most shoppers.

Litter and pollution

Climate impact is only part of the picture. Thin polythene bags are a major source of visible litter. They block drains, contributing to flooding, harm animals that swallow or become tangled in them, and break into fragments that remain in the environment for a long time. A widely cited 2015 study in the journal Science estimated that Sri Lanka was among the countries with the largest amounts of mismanaged plastic waste entering the oceans.

Reusable bags help because they are kept rather than discarded after one trip. A bag in a customer’s home or car is not in a drain or on a beach.

Sri Lanka's rules on polythene

Sri Lanka has steadily tightened its rules:

2017: a Central Environmental Authority regulation banned the manufacture, sale and use of polythene of 20 microns or less, with strict enforcement from the start of 2018.
1 November 2025: a Consumer Affairs Authority gazette required traders to charge customers for polythene bags with handles, instead of giving them away free. Supermarkets were the first to apply the change, and reports suggest plastic bag use fell quickly.

As shoppers start paying for polythene bags, more of them choose to buy a reusable bag or bring their own, creating an opportunity for shops to offer attractive, branded reusable bags.

Recycling and end of life

Being honest about end of life matters:

Polypropylene is recyclable, identified by resin code 5, but recycling depends on collection systems, which are limited in many places.
Single-material bags are easier to recycle. A bag made entirely of polypropylene, including handles and thread, is simpler to recycle than one combining different materials.
Laminated bags use polypropylene-based films such as BOPP, but printed and laminated layers can make recycling more complex.
Paper bags are widely recyclable and biodegrade, but only if kept clean and dry.

The best end-of-life strategy for any reusable bag is a long life: the more times it is reused, the smaller its impact per use.

Cost per use

Non-woven bags cost more per bag than polythene or paper bags. But a fairer comparison is cost per use:

A polythene bag used once costs its full price for that one trip.
A paper bag used once or twice costs its price over one or two trips.
A non-woven bag used fifty times spreads its cost over fifty trips.

For shops, selling reusable bags at a fair price, or giving them with larger purchases, can turn a cost into a source of income and brand exposure.

Branding value

A polythene bag carries a basic print for one trip. A paper bag carries a good print for one or two trips. A non-woven bag carries your brand for months, every time the customer reuses it, often to other shops, offices, schools and markets. In advertising terms, that makes a well-designed reusable bag one of the most cost-effective forms of brand exposure available.

What about thicker plastic "bags for life"?

Some shops offer thicker plastic bags, often made from LDPE, as a sturdier alternative to thin carriers. They are stronger and can be reused several times; the 2011 UK study found they needed about four uses to match a single-use HDPE bag on climate impact. But they are still plastic film, they can tear or stretch with heavy loads, and they offer less branding space and a less premium feel than a well-printed non-woven bag. For shops that want a bag customers will keep for months, non-woven or PP woven bags are usually the stronger choice.

A note on "biodegradable" and "compostable" bags

Bags labelled “biodegradable”, “degradable” or “compostable” can sound like the perfect answer, but they need care:

“Degradable” or “oxo-degradable” plastics may simply break into smaller plastic fragments rather than disappear.
Compostable bags usually need industrial composting conditions, with controlled heat and moisture, to break down properly. In a drain, river or ordinary landfill, they may persist for a long time.
Claims vary. Without clear certification and suitable disposal systems, these labels can mislead shoppers.

For most shops, a strong reusable bag that customers keep and reuse is a simpler and more reliable way to reduce waste.

A plan for switching your shop to reusable bags

Moving away from free polythene bags works best with a clear plan:

Count your current bag use. Know how many bags you give out each week and which sizes.
Choose your reusable range. Many shops need two bags: a light, low-cost bag for small purchases and a strong, branded bag for larger shops.
Design for reuse. Make the bags strong, attractive and printed with a reuse message.
Set a fair price. Price reusable bags so customers see the value, or give premium bags free with larger purchases.
Train your staff. Ask every customer whether they have a bag before offering a new one.
Reward reuse. Offer loyalty points or small discounts for bringing a bag.
Tell customers. Use signs at the entrance and till, and social media posts, to explain the change.
Review after a few months. Check sales of reusable bags and adjust sizes, quantities or prices.

Shops that follow a plan like this usually find customers adapt quickly, especially once the habit of bringing a bag is established.

Which bag wins?

The honest answer depends on the use:

Situation	Best choice
Everyday shopping, where customers can reuse bags	Non-woven or PP woven reusable bags
Heavy grocery shopping	Stitched non-woven or PP woven box bags
Premium retail and gifts	Laminated, metallic or shimmer non-woven bags
Very light, occasional purchases	Small D-cut non-woven bags or paper bags
Food delivery	Thermal insulated non-woven bags
Bulk products such as rice	Non-woven packaging bags, which customers can reuse

For most shops and brands, the winning approach is to encourage reuse: offer an attractive, strong, branded reusable bag, make it easy for customers to buy, and remind them to bring it back.

Making reusable bags work for different businesses

The right reusable bag strategy depends on the type of business:

Supermarkets and grocery shops sell large numbers of bags, so a low-cost light bag plus a strong stitched or PP woven bag for weekly shopping works well. Reward customers who bring their bags back.
Clothing, footwear and textile shops can include a quality branded bag with every purchase, because their bags travel through town and act as advertising.
Pharmacies often use small D-cut bags for light purchases, and can encourage customers to fold a reusable bag into a handbag.
Jewellery and gift shops benefit from premium metallic or shimmer bags that customers keep for gifts and special occasions.
Restaurants and food delivery businesses can replace single-use carry bags with thermal insulated bags for regular customers or larger orders.
Rice and grain brands can use non-woven packaging bags that customers reuse long after the product is finished.

In each case, the aim is the same: a bag that customers want to keep and use again.

Encouraging customers to reuse bags

Make bags worth keeping, with strong construction and attractive design.
Print a reuse message, such as “Reuse me”, “Carry me again” or “Bring me back”.
Offer a small reward, such as loyalty points, for customers who bring their own bag.
Train staff to ask whether customers have their own bag before offering a new one.
Sell bags at the till, where customers decide.
Choose sizes that suit everyday life, such as grocery shopping, school books and gym clothes.

An example in practice

The following example is illustrative and does not describe a real shop.

After the polythene bag charge comes into effect, a mini-supermarket notices that many customers are reluctant to pay for thin plastic bags. It introduces two reusable bags: a light W-cut non-woven bag at a low price for small baskets, and a stitched bag with the shop’s logo and “Bring me back” printed on it for weekly shopping.

Staff ask every customer whether they have a bag, and the shop gives loyalty points to customers who bring one back. Within a few months, many regular customers carry the stitched bag every week, the shop uses far fewer polythene bags, and its logo is seen around the neighbourhood every day.

Frequently asked questions

Are non-woven bags better for the environment than plastic bags?

Only if they are reused. Life cycle studies suggest a non-woven polypropylene bag needs to be used about 11 times to have a lower climate impact than a single-use polythene carrier bag. Used many more times, it is much better.

Are paper bags the greenest option?

Not necessarily. Paper bags need to be reused several times to beat polythene bags on climate impact, and they tear easily when wet. They are, however, widely recyclable and biodegradable.

Are non-woven bags recyclable?

Polypropylene is recyclable where collection and recycling facilities exist. Single-material bags are easiest to recycle.

Do shops in Sri Lanka have to charge for plastic bags?

Since 1 November 2025, traders have been required to charge for polythene bags with handles under a Consumer Affairs Authority gazette. Check the latest rules for details.

How many times can a non-woven bag be reused?

It depends on GSM, construction and care. A well-made bag can be reused many dozens of times; stitched and laminated bags are especially durable.

Should we give bags away free or sell them?

Many shops sell reusable bags at a fair price, which encourages customers to value and reuse them. Some give premium bags free with larger purchases as a reward.

Are compostable bags a good alternative?

Only where industrial composting is available. Without the right disposal conditions, compostable bags may not break down as expected. A strong reusable bag is usually a simpler choice.

Which non-woven bag lasts longest?

Stitched bags and PP woven box bags with BOPP lamination are the most durable bags in our range, ideal for long-term reuse.

How should customers clean non-woven bags?

Wipe laminated bags with a damp cloth. Hand-wash plain non-woven bags gently in cool water and dry them in the shade. Avoid hot irons and tumble dryers, which can damage polypropylene.

Can a reusable bag help my brand?

Yes. Every time a customer reuses your bag, your logo is seen by new people, which makes a well-designed reusable bag one of the most cost-effective forms of advertising.

Conclusion

No bag is perfect. Polythene bags are cheap and light but usually used once and easily littered. Paper bags are recyclable but weak when wet and need several uses to beat plastic. Non-woven bags cost more per bag, but they are strong, water-resistant, attractive and designed for many uses, which makes them the best choice wherever customers will reuse them.

The real winner is reuse. Offer a bag worth keeping, encourage customers to bring it back, and your bag will serve your customers, your brand and the environment for a long time.

Ready to offer a reusable bag your customers will keep? Talk to us.

Design a Reusable Bag