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Extended Christmas Returns - Until 31st Jan
Extended Christmas Returns - Until 31st Jan
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British Army Military Modular Sleep System

Sold out
Original price $116.00 - Original price $116.00
Original price
$116.00 - $116.00
Current price $116.00

British Army Modular Sleep System 
Looking for a versatile sleep system that can handle just about any condition? Look no further than the British Army Military Modular Sleep System. This ingenious design features three bags in one – a Medium weight bag, a lightweight bag, and an inner liner – giving you a temperature rating of around -20 degrees when all combined together. The Medium weight bag on its own is perfect for colder temperatures, while the Light bag can be used in warmer climates. Plus, the outer shell is made from ripstop nylon for extra durability, and the insulation is made from Hi-Tec to retain body warmth. So whether you're camping in the summer or braving the cold winter months, this sleep system has you covered.

The Medium weight  and lightweight compression sacks are sold separately due to the limited availability of the compression sacks. You can buy these from our website when they are available. 

Features Include:

  • British Army Issue military modular sleeping system
  • On its own the Medium weight bag is a great 3 season bag
  • Lightweight bag has in-built insect net
  • Inner mesh pockets for valuables 
  • Grade 1 used condition
  • Outer shell is ripstop nylon
  • Insulation: Hi-Tec  to retain body warmth
  • Comfort rating of around -20C
  • Extreme rating -32C
  • Size Large: 210 x 81cm 
  • Size Medium: 205 x 76cm
  • Weight Medium: Approx. 4kg
  • Weight Large: Approx. 4.5kg
  • Pack size for Medium weight bag approx: 40cm x 30cm 
  • Pack size for lightweight bag approx: 30 x 20cm 
  • Compression sacks sold separately ( Can be purchased from the website when available)

Youtube Review:

United Kingdom 

Under 2kg:
Standard Delivery (2-4 days) - £2.99
Express Delivery (1-2 days) - £3.99
Next Day - £4.99

Over 2kg:
Next Day - £4.99

Saturday Delivery:
Saturday Delivery - £6.99
Saturday Before 1pm - £9.99

Rest of the world
DHL Express - Calculated on checkout. 

Next Day Delivery
Orders must be made before 1pm for next day delivery.
Orders made after 1pm on Thursday will arrive on Monday (unless Saturday delivery chosen)
Orders made after 1pm on Friday will be shipped on Monday. 

For more information on shipping please see our shipping policy HERE

Mailing Bags

  • Small items - Paper mailing bags
  • Larger items - Biodegradable sugarcane bags 
  • Very large items - Cardboard boxes

Packing Tape

  • Small items - Gum tape / Kraft Tape (biodegradable)
  • Larger items - Kraft Tape (biodegradable)

If you buy any of our army surplus products then all the packaging will be plastic free. With army surplus you minimise the environmental impact of producing new clothes and reduce plastic waste. 

With our new items there may be plastic packing which comes from the supplier themselves. 

Although we are not totally plastic free (but pretty close) our goal is to reduce our plastic waste as much as possible and will continue to do so going into the future.


To obtain a return label if you live on the UK mainland please CLICK HERE. If you are unable to generate a returns label please email us at Please check your spam folder for replies from us. 

Exchanges are free

If returning an item for a refund we charge £2 for the return label which is taken from the refund amount. 

We accept returns / exchanges from 30 days of the order date. Items must be in original condition to be accepted for returns. A refund is given within 1-2 days of receiving the returned item. 

International order must arrange thier own return postage which is non-refundable. 

Customer Reviews

Based on 47 reviews
Modular Sleep System

Arrived Quickly. Well Packaged. All the components of the Sleep System were like new. Absolutely nothing wrong with any part. Would DEFINITELY RECOMMEND the seller, and the Sleep System. Great bit of kit! 5☆ 10/10

Glyn W
Great bag and system

Great bag and system.Great delivery and quality gear.

David Smith
British Army Military Modular Sleep System.

This as epected is an excellent piece of equipmet, very well packaged for delivery and arrived sooner than expected, Great job GoArmy

Stephen Poch
British Army Modular Sleeping Bag

Really pleased with my purchase, a great sleeping bag system that I am excited to use night fishing! They even gave me two free sleeping bag liners. 5*

Timothy Green
British Army Modular Sleeping System

All good except the main bag which smelt of soil and had a light covering of clay across 50 % of it. It also says that after 20 washes it loses it insulation properties. I thought Grade 1 was not used. The lighter and inner bag were fine. All roomy enough for my 5’11” frame and as someone who turns over, with one side less mobile than the other.