The Sea To Summit Basecamp -9C Down Sleeping Bag Regular is the ultimate companion for vehicle-based camping, providing ample space and unparalleled warmth and comfort in extreme conditions. Crafted with 650+ fillpower duck down, this sleeping bag ensures optimal insulation, while the perfluorochemical (PFC)-free Ultra-Dry Down treatment repels moisture, maintaining loft and performance. The lightweight recycled 20D nylon shell with a PFC-free durable water repellent (DWR) finish and the 20D recycled nylon liner guarantee durability and water resistance. The innovative Free-Flow zipper system offers versatile ventilation and freedom of movement. The relaxed mummy shape with an oversized hood provides ample space for a comfortable night's sleep. Plus, it can be zipped with another sleeping bag, offering flexibility for couples or additional warmth. adventure.

Key Features:

  • Seasons: 3, also good for warm weather with multiple ventilation options
  • Lower temperature rating: Comfortable down to -9°C
  • Best for vehicle-based camping: Spacious and efficiently warm
  • 650+ fillpower duck down: Responsible Down Standard (RDS)-certified high loft provides maximum thermal performance
  • Recycled 20D nylon shell with a PFC-free DWR treatment: Keeps the bag dry, light, and durable
  • 20D recycled nylon liner: Ensures improved comfort throughout the night
  • Free-Flow zipper system: Zipper opens either side of the bag or footbox for desired ventilation
  • Box baffle construction: Reduces down shift and maximises warmth retention
  • Relaxed mummy shape: Spacious yet provides efficient warmth
  • Oversized hood: Maximises warmth retention with adjustment cords and room for a pillow
  • Comes with Ultra-Sil compression bag and storage cell: For compact packing and storage
  • Can be zipped with another compatible sleeping bag: Can be coupled with another Basecamp or with most Sea To Summit women’s and unisex sleeping bags

Brand : Sea To Summit

SKU: S2ST-ASL041091-050301

Model # : ASL041091-050301

Barcode : 9327868157860  (AD-2)

Gender : Womens

Gender : Unisex

Gender : Mens

Product Family : Basecamp

Length : Regular

Shape : Relaxed Mummy

Zipper Position : Dual Zipper

Insulation Type : Down

Lower Temperature Limit (degrees Celsius) : -5 to -9

Weight : 1832g

Compressed Volume : 13.9L

Compression Sack Size : 26L

Fill Weight : 820g

Fits Up to User Height : 185cm

Free shipping on orders over $100 to Australia & NZ*
Shipping on small orders (under $100) only $9.95
Express shipping to Australia & NZ only $15

Standard Shipping (AU/NZ) – FREE on orders over $100 and $9.95 on orders under $100. Orders are dispatched within 1 business day. Click here for shipping delivery times

Select ‘Standard Shipping – Auspost Only’ if you would prefer your parcel is sent with Auspost. Otherwise it will be shipped with any of our available carriers. Auspost Only shipping is not available on some very heavy/bulky orders.

Express Shipping (AU/NZ) – Need it faster? Express Shipping is available for $15. Express Shipping is not available on heavy/bulky orders. Orders placed before midday on business days are usually dispatched same day (otherwise within 1 business day). Delivery times in the table below.

Click and Collect – Shop online and collect in our Milton, Brisbane store, free for all orders. Orders are usually ready within 2 hours (during opening hours). Click here for address and opening hours.

Terms and conditions apply, click here for a full overview of our shipping policies

Manufacturing defects covered, replaced or repaired if soon after purchase.

  • If you have selected the wrong product/size for you, or want to exchange/return for any reason except for warranty or our error, this is referred to as a 'change of mind' return.
  • Not all products are eligible for change of mind returns (click here for excluded products). Final Clearance products are not eligible for change of mind returns.
  • Once you submit a Return Request, we will provide return instructions via email (along with a prepaid return label if applicable). Please wait to receive this before returning any items (Try 2 Anything excluded)
  • Change of mind returns can be resolved by your choice of exchange, full store credit, or a refund. Refunds are subject to a $19.95 admin fee.

For a full overview of our returns and warranty policies, see Returns and Warranties

Michelle
18 April 2026

Activity: Hiking

Age: 36-45

Priority: Design Quality/Appearance

Options galore

, 18 April 2026

I've had this bag for a while now and have taken it on many trips. I absolutely love it. It's marketed as a vehicle based camping bag, but I use it for hiking. It's definitely not ultralight, but it's not too heavy either and I use a compression dry bag to really squash down the bulk when transporting it in my pack. It's extremely warm. The color is amazing (I really hope sea to summit keep making sleeping bags in this colour). But by far the best things about this bag is 1: it is extremely comfortable & 2: there are endless options of how you can use it. The top completely unzips and can be used as a quilt, which i have done a few times in warmer weather, and cuts It's weight in half. If sea to summit brought out a bag that had all the features of the Basecamp, but it was a bit lighter (aiming for 1kg or less) it would be the best bag on the market, hands down. For me, its worth carrying the little bit extra weight for all the amazing features of this bag. Absolutely the best nights sleep in this bag! 100% recommend.

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