You can sleep all through the night even in frosty conditions with the Sea to Summit Basecamp Bt4 Sleeping Bag. 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. For a soundless and comfy sleep no matter what the climate the Basecamp BT4 is the one you can rely on.
Hi. I own a sea to summit comfort plus insulated large sleeping mat. Will I be able to fit it in the BT4's sleeping mat sleeve? Thanks!
G'day Vishnu,
We've asked Sea to Summit about this one and they said that they've never heard of anyone having issues with getting their Large Comfort Plus Insulated Sleeping Mats to fit nicely in the Sea to Summit Basecamp Bt4 Long Sleeping Bag.
Hi. I have a Roman Palm Passport and was happy with it until I washed it and now it is not warm enough for winter. Is this bag a warmer better quality bag than the roman and is the bulk worth it over just buying a new Roman - 5 palm passport bag? Down bags are not an option for me re ethics.
G'day Jack,
The Sea to Summit Basecamp Bt4 Sleeping Bag is a much higher quality sleeping bag than the Roman Palm Passport, is rated to -8C and as long as you follow the care instructions included with the sleeping bag (Sea to Summit offer pretty comprehensive information), you should get many years of use out of the bag.
In regards to the bulk, that's probably only a question you can answer in terms of what you need it for and whether it is practical.
Hi I am interested in this sleeping bag. What size compression dry sack from Sea to Summit do you recommend?
G'day Jack,
The Sea to Summit Basecamp Bt4 Sleeping Bag is a much higher quality bag than the Roman Palm Passport.
It also comes with its own compression sack and when compressed, has a volume of around 14.6 L.
Seeking a comparison between this bag and the Sea to Summit TkII Women's (please see my question posted against that product also). Which bag is suggested for late Spring in the Western Canadian mountains for a woman who feels the cold? Many thanks!
Will the pillow attachment and straps adjust enough to fit an Exped Downmat 9LW? Alternatively, can the straps be removed so they don't create lumps between the bag and the mat?
G'day Peter,
I have just checked the display model that we have of the Basecamp BCII (we don't have the Bt4 on display, but it has same attachment system) and you can remove the straps and move them up and down the three mat loops positions on the bag. The straps are also very thin, so if you did leave them on, they wouldn't be much of a bother Peter.
I have actually given this a go with the Downmat 9LW - and while it was a good 5-minute struggle, you can get it to fit onto the sleeping mat loops on the Basecamp bag.
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