Search Search Login

Sea to Summit

Basecamp Bt3 Sleeping Bag

From $239.90
or 4 easy payments of $59.98 with

Looks like you need a few of those...
We might be able to offer a lower price for a bulk amount.

It's easy, just send us an email (
with your order info and we'll crunch the numbers & get back
to you right away.

How to Pack a Sleeping Bag Watch video

You’ll be deep in a doze, no matter what the change of temperature is with the Sea to Summit Basecamp Bt3. This model takes everything you love about the traditional Basecamp sleeping bag range but swaps out down for synthetic which makes it perfect for adventurers who want full features, without the strain on your wallet. 

Insulated with Sea to Summit’s Thermolite fibre, you can be more carefree with this bag, as the synthetic fill makes it easier to clean and take care of. One of the most charmingly versatile sleeping bags on the market, Sea to Summit has added every feature to ensure you can use this bag in all weather conditions.

The clever design lets you adjust the bag to your preferred sleeping arrangement – so you can unzip the side for temperature control, unzip both sides to use it as a quilt with a closed foot box, or you can have your feet hanging out while staying completely zipped up. You can also use it with both sides undone like you would at home in your own bed or remove the top for very warm evenings. If you’re travelling light, just take the top part with you as the bottom will hook onto your mat and keep it in place all night.

Best of all, this bag has a pillow attachment and quilt loops to secure your whole sleep system together – so you can toss and turn all you like and wake up without a crookneck. A comfortable and soundless sleep in the elements is always possible with the versatile Basecamp BT3 Bag from Sea to Summit.

  • Three-season sleeping bag
  • Spacious rectangular design
  • Pillow attachment system
  • Quilt loops
  • Sleeping mat sleeve
  • Versatile adjustment for all weather conditions
  • Cushioned internal hood draw-cord
  • 2-way zip on each side of the bag
  • Includes compression sack
Snowys Code:
Supplier Code:
Comfort Temp. Rating:
2 °C
Lower Temp. Limit:
-4 °C
Max. User Height:
183 cm
Internal Girth:
194 cm Chest | 190 cm Hip | 142 cm Foot
External Dimensions:
195L x 97W x 10H cm
Packed Dimensions:
40L x 20W x 20H cm
Compressed Volume:
11.6 L
30D Nylon Taffeta 345T with DWR
Fill Material:
THERMOLITE® insulation
20D Nylon
Zip Draft Tube:
Neck Draft Tube:
With internal drawcord
YKK #5 on each side plus separate foot zip
1.654 Kg
Suggested Use:
Camping | Hiking
Limited Lifetime

Be the first to review this product

Just some questions 1 answer

How big is this sleeping bag and is it small and light enough for hiking? Does the sleeping mat and pillow come with the sleeping bag?

- Adelaide (6 months ago)

G'day Terry,

When packed away, the Sea to Summit Basecamp Bt3 Sleeping Bag measures approximately 40 x 20 x 20 cm & will take up about 11.6L of space. It is a pretty good option for a hiking sleeping bag. It doesn't come with any sort of pillow or sleeping mat though. 

- Snowys(6 months ago)
Heads up! Our store in Brendale (QLD) doesn’t have footwear available for fittings. If you order online, your footwear will be sent from SA... quick-smart!
Heads up! Our store in Brendale (QLD) doesn’t have footwear available for fittings. If you order online, your footwear will be sent from SA... quick-smart!
is initializing