What blanket material works best for under a duvet in South African homes?

Cotton is a good all-round choice for warmer months, while wool or merino works well for cooler rooms or winter because it regulates temperature and wicks moisture.

How do I choose the right weight blanket for under my duvet?

Match the blanket weight to your needs: lightweight for summer, midweight for three-season use, and heavyweight for winter. Also consider your duvet tog to keep the combined warmth comfortable.

What size blanket should I use under my duvet?

Choose a blanket that matches your duvet size (single, double, queen, king). A blanket that’s too small shifts around, and one that’s too large adds bulk.

Are there easy-care blanket options for under a duvet if I have allergies?

Yes, look for machine-washable, hypoallergenic blankets made from natural fibres like cotton or treated wool. These are easier to launder and resist dust mites.

How to choose the best blanket for under a duvet

How to choose the best blanket for under a duvet: material, weight, care and practical tips for South African homes. Clear, calm advice from Bash.

Published:May 18, 2026

Updated:September 9, 2026

5 min read

Photo by Darya Grey_Owl on Pexels

Match material to climate

Choose breathable cotton or wool for year-round comfort depending on season.

Why the blanket under your duvet matters

We often think of a duvet as the whole story, but the right blanket underneath makes a big difference to how warm, comfortable and easy-to-care-for your bed is. A thin or midweight blanket acts as a temperature buffer, keeps the duvet cleaner for longer, and gives you an extra layer you can remove on warmer nights. In short, the blanket you choose affects sleep quality, laundry habits and the feel of your bedroom.

What to think about first

Local climate and seasonality: do you need year-round layering or seasonal swaps?
Material and breathability: natural fibres usually regulate temperature better.
Weight and loft: lighter blankets for summer, midweight for three-season use.
Allergies and skin sensitivity: choose hypoallergenic or easy-care options if needed.
Care and durability: how often you’ll wash the blanket and how it holds up.

Common blanket materials - quick guide

Cotton: breathable, lightweight and easy to wash - good as an all-round, affordable under-duvet layer.
Wool (including merino): naturally temperature-regulating and moisture-wicking - ideal for cooler months and for people who prefer natural fibres.
Fleece and microfibre: warm and budget-friendly, but less breathable than natural fibres - useful in very cold weather or rooms that are well-ventilated.
Blends (cotton-poly, wool-blend): balance softness, care and price - often a practical middle ground.

If you want product inspiration or to shop a range of options, explore our Bed & Linen to compare fabrics and sizes.

Tip: match the blanket size to your duvet size - a blanket that’s too small shifts around, and one that’s too large adds bulk.

How much warmth do you need? Simple steps

Check your room: measure typical night temperature and how drafty the space is.
Decide on duvet tog: use a lower tog duvet if you plan to layer a warmer blanket underneath, and vice versa.
Choose blanket weight: lightweight (for summer), midweight (three seasons), heavyweight (winter). Try to keep the combined duvet + blanket tog within a comfortable range for your climate.

Practical care and allergy considerations

If you or someone in the household has allergies, choose machine-washable blankets and natural-fibre options labelled hypoallergenic or treated for dust-mite resistance. Cotton and some treated wool blankets are usually easier to care for; fleece and microfibre wash quickly but may hold static. Think about how often you’ll launder the layer under the duvet - the easier to wash, the more likely it will stay fresh.

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Selecting the best blanket for under a duvet - by use case

Below we map common bedroom situations to the blanket types we recommend.

Warm homes or summer months

Choose a lightweight cotton or linen-blend blanket. These breathe well and stop you overheating while letting the duvet keep its shape. Typical budget: around R150-R600 depending on size and thread quality (estimate).

Cooler rooms or winter

A midweight wool or merino blanket under a medium tog duvet gives steady warmth without excessive bulk. Wool helps wick moisture and keeps you warm when the temperature drops. Expect mid-range wool blankets from about R600-R2 000 (estimate), depending on fibre and origin.

Shared beds with different preferences

Use two separate blankets or layer with a thinner blanket that’s easy to remove mid-sleep, or use two separate blankets tucked under the duvet on each side. That way each person can adjust without changing the whole bed setup.

Budget and easy-care options

Microfibre and synthetic fleece blankets are warm and often cheaper to replace - good for households that need frequent washing. They’re less breathable than natural fibres, so we recommend them for very cold months or rooms with good airflow. Typical entry-level prices start around R120-R400 (estimate).

Fit, thickness and how to tuck

Choose blanket dimensions that match your bed size (single, double, queen, king) - a standard blanket that equals your duvet size is simplest.
For neatness, fold the blanket evenly inside the duvet cover or lay it flat beneath the duvet so edges align.
If you like a layered look, let the blanket peek out at the foot of the bed for texture without extra bulk at the shoulders.

For more reading on fabric choices and care, see our Bed & Linen articles /category/home/bed-bath/bed-linen, which cover fabric pros and cons in more detail.

A few buying checklists to keep with you

Material: natural fibre preferred for breathability (cotton, wool) unless you need heavy synthetic warmth.
Weight: pick lightweight or midweight depending on season and bedroom temperature.
Care: machine-washable at home vs. dry-clean only.
Budget: set a sensible range - a durable midweight blanket often gives better long-term value than the cheapest option.

We know shoppers appreciate seeing options side by side - when you’re ready to compare products, our Bed & Linen pages list sizes, materials and care instructions so you can match a blanket to your duvet and bedroom needs. Explore blankets and duvet pairings.

Final thoughts

Choosing the best blanket for under a duvet is about balancing warmth, breathability and ease of care for your South African home. We recommend starting with the fabric and expected season of use, then matching weight and size. Small, practical choices-like selecting washable materials and the right blanket size-make the biggest difference to everyday comfort.

Sources

Sleep Foundation - Guide to blankets and layering
The Woolmark Company - Benefits of wool for bedding
Mayo Clinic - Sleep environment and temperature tips
Allergy UK - Bedding and allergy-friendly materials

Last updated: September 9, 2026

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How to choose the best blanket for under a duvet

Match material to climate

Why Choose Bash?

Free Delivery

30-Day Returns

Nationwide Support

Why Choose Bash?

Free Delivery

30-Day Returns

Nationwide Support

Think weight, not just warmth

Prioritise care and fit

Why the blanket under your duvet matters

What to think about first

Common blanket materials - quick guide

How much warmth do you need? Simple steps

Practical care and allergy considerations

Selecting the best blanket for under a duvet - by use case

Warm homes or summer months

Cooler rooms or winter

Shared beds with different preferences

Budget and easy-care options

Fit, thickness and how to tuck

A few buying checklists to keep with you

Final thoughts

Sources

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