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Cosynite Wool Underblanket
 Cosynite Wool UnderblanketCosynite Wool Underblanket 

Cosynite Wool Underblanket

  (3 Reviews)
  • Temperature-regulating wool under blanket
  • Useful for Raynaud's disease and arthritis
  • Available to buy in 3 mattress sizes
  • Pressure relieving for added comfort
£53.99(Inc. 20% VAT)

Brand:  Thorpe Mill

Cosynite Wool Underblanket

The Cosynite Wool Underblanket  is designed to restore sound, natural and comfortable sleep in the most natural and effective way for all ages. Cushioning sensitive joints with a layer of warm air trapped in the natural fibres, this ultra-soft blanket supports aching muscles, retains body heat and reduces cold spots in the bed. 

What's Included?

  • 1 x Bed Fleece Blanket

What Size Is the Wool Blanket Available In?

Blanket Size Dimensions (cm) Dimensions (inches)
Single 91cm x 152cm 36" x 60"
Double 137cm x 152cm 54" x 60"
King  152cm x 152cm 60" x 60"

Will the Fleece Mattress Topper Cover My Entire Bed?

The Fleece Mattress is designed to cover the majority of the bed, leaving only the pillow area at the head of the bed uncovered.

How Can the Mattress Topper Help Me?

The Wool Underblanket can help relieve various ailments, including:

  • Raynaud's disease
  • Discomfort in bed
  • Coldness/overheating in bed
  • Backache
  • Rheumatism
  • Arthritis
  • Poor circulation
  • Cramp
  • Numbness
  • Pins and needles
  • Relieving pressure points

Key Features and Benefits

  • Can be laid under your bottom sheet
  • Non-static and dust-repellent
  • Machine washable for convenience
  • Will not move or wrinkle on the bed
  • Warm in winter and cool in summer
  • Absorbs perspiration to allow dry sleep
  • Compatible with electric blankets
  • Made from British wool
  • Used in hospitals across the country
  • Can be used to add comfort to orthopaedic beds 
  • Elastic corners fix the blanket to your mattress
  • Designed to fit an average mattress between 6"- 7" deep

How Can the Blanket Help With Raynaud's Disease?

The Cosynite Blanket encourages blood circulation and reduces the likeliness of waking in the night from discomfort, pins and needles, numbness and feeling cold to allow for a night of deep, restful sleep.

How Can the Blanket Help With Rheumatism and Arthritis?

The Wool Underblanket's design supports the body's joints to permit an ache-free night's sleep. By alleviating the need to toss and turn to get comfortable in bed, pressure is distributed away from sore joints.

How Does the Underblanket Work?

The Cosynite Wool Underblanket cushions sensitive joints with a layer of warm air trapped in the soft natural fibres supporting aching muscles, retaining body heat and reducing cold spots in the bed.

Can I Wash the Cooling Mattress Topper?

The blanket is designed for long-term use and also absorbs perspiration to allow a dry night of rest. For added convenience and cleanliness, the blanket can be hand washed, machine washed or dry cleaned. 

Where Do I Fit the Underblanket?

The Lambswool Underblanket should be fitted on top of your mattress and under your bottom sheet for maximum comfort and benefit.

How Does the Wool Fleece Underblanket Fit on My Bed?

Designed to fit mattresses with an average depth of 6" to 7", the blanket features elastic corners which help fix the blanket to your mattress. This ensures the underblanket stays in place so you can get a restful night's sleep.

What Is the Mattress Topper Made From?

Naturally fire-retardant, the underblanket is made from wool. This temperature-regulating material keeps you cool during summer and toasty warm during winter months.

What Is the Backing Material Made From?

To ensure stability and longevity, the 100% pure wool pile used in this fleece is attached to a backing material. This backing material is made from an acrylic-based material, which has been treated to be machine washable, along with the rest of the product.

What is the Depth of This Underblanket?

The pile used for the Cosynite Underblanket has a depth of 25mm, allowing it to provide a great deal of comfort and relief.

Is the Underblanket Likely to Flatten?

The Wool Underblanket features a thinner design to allow for temperature-regulating engineering, rather than merely warming the body. The blanket is also thin enough to be machine washed for added convenience and may thin slightly over time, however, the item is designed for long-term use.

Delivery - UK

This product is normally dispatched by Royal Mail.

The normal delivery expectation of this service is 1 to 3 working days.

When ordering before 14:00 Monday to Friday, your item will usually be dispatched the same working day.

We offer free delivery on all orders of £40 and over. On orders below £40, a £2.95 delivery charge is applicable:

Order Value Delivery
Up to £39.99 £2.95
£40.00 and over FREE

Please see our delivery pages for more information. For up to the minute delivery information, please call our customer care team on 020 7501 1107 who will be happy to help.

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Customer Reviews
Average Rating (3 Reviews):  
Write a Review and share your opinions!

Soft and comfortable under blanket
11 December 2023  |  Albert

The blanket is a good fit and has elastic straps on each corner to stabilise it.

Was this helpful to you?  Yes  /  No

This review has not been appraised.

Wool under blanket
29 April 2023  |  Lynne

Wonderful nights comfortable sleep.
No more overheating or aching hips. Highly recommend this blanket

Was this helpful to you?  Yes  /  No

1 of 1 people found this review helpful.

Good function but poor fit
26 April 2022  |  Chris

I'm happy enough with it but it's about a foot short and hence the loops are no where near the corners of the mattress. I'm using it unanchored and it seems to stay put.

Was this helpful to you?  Yes  /  No

This review has not been appraised.


Hi Chris,

Many thanks for leaving a review with us.

The Cosynite Underblanket is designed to cover the entire width of your bed, leaving only the pillow area at the top of the bed uncovered. Your Cosynite should correctly attach with the loops at the foot end of the mattress, leaving the unattached area at the head. This should account for the space you mention. Our sizing guide found on the product page will give you an indication of just how much space will be left for your pillows depending on the size of your mattress.

We hope this information helps clear up your issue.

Kind regards,

Seth at

Keeping you warm when it counts

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