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Delivering a comfortable night’s sleep, the OEX Fathom EV 400 Sleeping Bag is an exceptional four-season sleeping bag. With a lightweight synthetic fill, it provides luxurious warmth without the weight, combined with the ultra-comfort lining, you so you can just drift off with ease.

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Product code: 15904992 / 329250

  • 4-season sleeping bag
  • Lightweight synthetic fill
  • Ultra-comfort lining
  • Internal security pocket
  • Internal insulated baffles
  • Anti-snag zipper band
  • Includes compression stuff sack - shrinks to fit in your pack
  • Comfort temperature: -1°C
  • Limit temperature: -8°C
  • Extreme temperature: -26°C
  • Fabric: 20D Nylon Shell and Lining
  • Dimensions (unpacked): 215 x 80cm
  • Weight: 1125g
  • Tested to EN13537 standard
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This product qualifies for the following delivery methods

Standard UK Delivery (3 - 5 Days) (FREE)


A tracking link will be provided once your order is despatched.

Premium Express Delivery (£6.95)


A tracking link will be provided once your order is despatched.

Bike Delivery (Up to 7 Days) (FREE)


This applies to all bikes, and these orders are upgraded to a specialist courier service.

Free Standard In Store (FREE)


Collect In Store (FREE)


Delivery times and days vary for each store, but we will contact you when your order is ready to collect. Please do not contact our Customer Care team for updates until after the estimated delivery time in your order confirmation email.

Premium Next Day (£6.95)


Next day cannot be offered in the following areas, and will be attempted within 48 hours: BT (all Northern Ireland), GY, IM, JE, KW11-17, HS, PH32-35, ZE.

International delivery

From £4.99 to over 200 countries worldwide. Some restrictions apply.


Returning orders to us is easy. Whatever your reason, we offer a refund or exchange within 28 days of delivery or collection.

Ratings & Reviews

Overall Rating

4.00 out of 5
2 reviews
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4 out of 5

Ok sleeping bag but not four seasons

Good value for money however it’s not warm enough to be a four seasons bag.

4 out of 5

Good sleeping bag

A very well thought out design on this sleeping bag and the compression bag it comes in. Doesn't feel too heavy to carry in my backpack and when tested outside felt nice and toasty. I'm 6'1 and i fit in it reasonably well, great purchase