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Sea To Summit Basecamp Synth Bt4 Regular Sleeping Bag

Normally $449.00 Our Price: $399.99

Out of Stock

Sea To Summit Basecamp Synth Bt4 Regular Sleeping Bag

The Basecamp has been designed for those customers who find a mummy bag restrictive, and who would prefer to enjoy a little more comfort and stretch out space whilst escaping outdoors.The Basecamp offers a contoured rectangular design to accommodate sleepers who like to stretch out full length, or those who like to curl up into a ball. It is also a fantastic solution for the restless sleeper who can now toss and turn in comfort, without being woken up because of a restrictive bag design.The Basecamp is available in either three 750+ loft ULTRA-DRY Down™ models to keep packed size low (BcI, BcII and BcIII), or two THERMOLITE® models where size isn’t a concern but a more affordable sleeping bag is desirable (Bt3 and Bt4).

If you are looking for the ultimate in camping comfort, the Basecamp has also been designed to work with our Air Sprung Cell sleeping mats and Aeros Pillows to create a truly comprehensive sleep system. Slide your mat into the small pocket at the foot of the bag and then use the strap and loop set-up to secure the upper section. Then inflate your Aeros Pillow to the perfect pressure, before securing it into place with the elasticised strap underneath the hood.VersatilityNo matter which way the weather turns, the Basecamp bag can be both modified to suit. Zip yourself in and pull the internal draw-cords tight to combat the cold. If the weather takes a turn towards summer, then you can vent the feet, or unzip one or both sides to keep yourself cool and comfortable.

The Basecamp is also so much more than just a sleeping bag, the dual zipper design means that it can transform from a substantial and sumptuous sleeping bag into a svelte summer quilt. The bottom of the quilt holds its shape as a roomy foot-box, and a series of attachment loops even lets you secure your quilt onto your mat to ensure maximum warmth.


  • Thermolite insulation
  • Spacious rectangular shape
  • Pillow attachment system under hood to hold Aeros large pillow in place (not included)
  • Two position sleeping mat attachment system
  • Zip draft tube with anti-snag
  • Cushioned internal hooddraw cord
  • 2 way YKK #5 zip on each side of the bag, plus separate foot zip
  • Includes 70D compression bag
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Upon receipt of payment your order will be packed and posted either the same day, or at latest the next working day.

Paypal and credit cards are processed almost immediately, while bank transfers can take 24-48 hours. 

In general we find that deliveries to Melbourne, Sydney, Adelaide, Brisbane metro and VIC regional are made within 1-3 working days. NSW, SA, TAS, ACT and NT take 2-5 working days. Regional QLD, WA and other remote areas will take 5-7 working days.

Please note these are only expected deliveries times and occasionally delays may occur.

We use Australia Post for all of our deliveries except for Bulky Items. For bulky items we use Direct Freight Couriers.



Our internal shipping charge calculator will tell you the cost of your postage prior to your checkout. In most cases buying more than 1 item will result in cost savings to you. 

  • Small items up to 500g cost  around $7 postage. Depending on the weight and size you will get 2 sometimes 3 small items posted for this amount.
  • Most larger items post for about $12 and you will generally be able to add 1-3 small items at no extra charge
  • Once you purchase products over 3 kg in weight there is generally, only a small amount of extra postage charged


You can add smaller items together with bulky items and there will generally be no or a small added postage cost.
Ordering items such as 2 bike cases may not result in any savings due to their volume. Ordering mid-size items like two fluid trainers together will result in very good savings though. You will get your quote for shipping costs before you checkout.

If you have any queries please email us at!

We now ship to New Zealand. For further details please visit our International page here.

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