21% off RRP save £38.05

Therm-a-Rest MondoKing 3D Large

£146.95 RRP £185.00

free uk deliveryNext working day UK* delivery


The Therm-a-Rest MondoKing 3D™ is Therm-a-Rest's largest mattress in their Camp and Comfort range, it uses three-dimensional construction to maximise sleeping surface and deliver the best in comfort ideal for car camping and family camping.

For 2019 they have updated the outer fabrics to use a supple stretch knit to provide deluxe breathability and luxurious plush surface for extra comfort and restful night's sleep!

This Therm-a-Rest mat offers extra width and length as it is the LARGE SIZE, it has generous 10cm thickness and vertical side walls that maximise useable sleep surface and the foam core delivers all season warmth to give you the comfort of home and a great night's rest wherever you might go!

With dual valves, this self-inflating mat will simply inflate on its own, just add a couple of extra breaths of air to personalise the firmness of this mat, and you are ready to get a really good night's rest and to wake up refreshed and ready to go.

  • 50D polyester knit top fabric
  • 50D polyester bottom fabric
  • Urethane foam inner
  • Self inflating dual valves
  • Compatible to couple up with other 3D Therm-a-Rest mattresses
  • Stuff sack included
  • R-value: 11.4
  • Pack size: 66 x 23cm
  • Size: 196 x 63 x 10cm (Large)
  • Weight: 2.5kg
  • Therm-a-Rest MondoKing 3D Large

Delivery Charges

Just £1.95 next working day UK delivery - Free on orders over £50

Delivery Times Explained

In Stock 2 day deliveryNext working day delivery - stock is available from our warehouse and will normally be despatched the same day if you order by 3pm.

All items are sent on a next working day service (large/expensive items DPD Monday-Friday, smaller items Royal Mail Monday-Saturday). If you require Saturday delivery on larger/more expensive items (over about £50) there will be an additional charge, please give us a call for a quote.
Northern Ireland, Highlands and Islands will take 2 working days.

On OrderOn order - Please call to check availability

Delivery Method

Small items may be sent by Royal Mail 24h, larger or more expensive items with DPD Next Day may require a signature on delivery. In the event that no one is available, the parcel will be taken to your local depot and a note will be left with instructions for redelivery.

Detailed delivery information and international rates

Our Guarantee

Our "no quibbles" guarantee means that if for any reason you are unhappy with the item you have purchased just return it in its original condition within 28 days and we will issue a full refund or exchange.

FAQs and more information on returns and exchanges

Therm-a-Rest MondoKing 3D Large Marine Therm-a-Rest MondoKing 3D Large Marine Therm-a-Rest MondoKing 3D Large Marine Therm-a-Rest MondoKing 3D Large Marine Therm-a-Rest MondoKing 3D Large Marine Therm-a-Rest MondoKing 3D Large Marine Therm-a-Rest MondoKing 3D Large Marine Therm-a-Rest MondoKing 3D Large Marine

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Our Code: 521309

Supplier Code: 9210

Just £1.95 UK Delivery - Free over £50
Size Colour Stock
One Size Marine Blue 5 in stock(5 in stock)
Order before 3pm for next working day delivery.
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4.9 98% positive
  • Very quick service,price very competitive
    September 10, 2019
  • Nice easy transaction ordered one day they arrived next day, great communication competitive prices strongly recommend.
    September 10, 2019
  • Very Good.
    September 9, 2019
  • Very quick delivery and the items and sizes were as expected. Good prices in the sale too.
    September 9, 2019
  • Simply put an all round excellent service, had no need to contact customer service (so can’t comment on that). But in all aspects from order to delivery, I was kept in the loop. Also the use of DPD as their courier service is a winner, an altogether excellent service.
    September 9, 2019
  • Very good customer service and also the delivery was good and fast
    September 9, 2019
  • September 8, 2019
  • Cheaper than anywhere else, good communication and arrived on time.
    September 8, 2019
  • Order arrived on time and well packaged.
    September 7, 2019
  • Very prompt service and excellent communication.
    September 7, 2019

1,334 reviews since June 2017

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£1.95 Next working day UK* delivery - Free on orders over £50 - Order before 3pm - (*2 working days for Highlands, Islands and Northern Ireland)