Professional 3-4 Season Mummy Sleeping Bag (300 GSM)

Professional 3-4 Season Mummy Sleeping Bag (300 GSM)


  • Ultra Warm Filling: 300GSM (2 x 150g/m2).Water Resistant and Perfect for 3-4 Seasons
  • Comfort Temperature: of +10°C to 0°C. Extreme use down to -10°C
  • All Body Coverage: Drawstring mummy hood covers your entire head and face to keep warm
  • Internal Storage Pouch: for valuables and mobile phones, wind-proof double zipper system and internal drawstring collar for ultimate comfort
  • Comfortable, Durable & Lightweight: for Summer and Winter camping, outdoor use. Compression bag for easy carrying included

142 in stock

Product Information

This premium quality, 3-4 season sleeping bag from Active Era is made from a durable 190T polyester outer shell, with an ultra-warm 300GSM double filling for use in temperatures from 0°C to 10°C and extreme temperatures down to minus 10 degrees Celsius. Both the compression bag and sleeping bag’s outer shell are water resistant in damp environments, and it is fully machine washable too.

Instead of a single 300GSM filling, this professional sleeping bag is packed with a double layer containing 2 x 150g/m² hollow fibre layers, and a drawstring hood. This provides a considerable increase in insulation and warmth compared to a regular single layered 300GSM sleeping bag, and ideal for use outside in both winter and summer.

Key Features

  • 300GSM (2 x 150g/m²) ultra-warm filling.
  • 190T Polyester durable outer shell – Water resistant against damp.
  • Fully Machine Washable.
  • Double zipper system with windproof draft tube lining for extra insulation.
  • Secure internal pouch for valuables (mobile phones, electronics, accessories).
  • Additional internal drawstring collar pulls above the shoulders to keep out unwanted drafts and wind.


Free Next Day Delivery:

All orders sent within the United Kingdom come with FREE NEXT DAY DELIVERY.

  • Next Day Delivery is available if you order before 4:30 pm Monday to Thursday.
  • If you place your order after 4:30 pm on Thursday your item(s) will be delivered on Monday.
  • If you place your order after 4:30 pm on Friday your item(s) will be delivered on Tuesday.

Your order will be delivered via DPD. You will receive an SMS & Email highlighting your allocated 1 hour delivery slot.

Follow the link within the Email or SMS to action the following changes to your delivery:

  • Change your delivery day
  • Leave your item in a safe place
  • Deliver your item to a neighbour

For further information & Steps to Return your item please visit our Delivery, Returns & Refunds Page


We really hope you like your purchase from Active Era however in the event you do wish to make a return, we offer a 30-day money-back guarantee for your peace of mind. For further information & the steps to return your item please visit our Returns Page.

Our Returns Address:

Active Era Returns
Unit 6
West Road Industrial Estate
NG34 0QU


When will I receive my Refund?

Following a successful inspection of your return we will process a refund to the credit / debit card or PayPal account which was used to place the original order.

Please allow 5 working days for the refund to appear in your account.

For further information about our refund policy item please visit our Delivery, Returns & Refunds Page


All Active Era products come with a one (1) year Limited Warranty valid from the date of purchase. For further information please visit our Warranty Page.

Product Video


Model SB-M300
Dimensions (LxWxH) (cm) 220 x 80 x 55
Type Mummy
Net Weight 1.5
Filling GSM 300
Water Resistant Yes
Seasons 3/4
Comfort Temperature Range 10˚C
Limit of Comfort Temperature Range 0˚C
Extreme Temperature Range -10˚C
Drawstring Hood Yes
Internal Pocket Yes
Wind-Proof Zipper Yes
Insulation Tube Yes
Compression Straps Yes
Ripstop No
Material Shell 190T Polyester Waterproof
Material Liner 190T polyester
Material Filling 150GSM*2 Polyester
EAN 5690851207885


mummy sleeping bag lifestyle

Product Comparison

Dimensions (LxWxH) (cm)
Filling GSM
Comfort Temperature Range
Limit of Comfort Temperature Range

Professional 3-4 Season Mummy Sleeping Bag (300 GSM)

220 x 80 x 55
Add to basket

Premium Lightweight Mummy Sleeping Bag (150 GSM)

210 x 80 x 50
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Premium Warm Lightweight Envelope Sleeping Bag (200 GSM)

186 x 75
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