Complimentary U.S. shipping · No minimum order5–8 business days · 30-day returns

Reactor Fleece Sleeping Bag Liner – Past Season

$53.97

  • Thermal boost to retain heat and warmth, as the core of your sleep system the Reactor liner extends the performance of your sleeping bag and sleeping mat in the coldest of conditions
  • Hollow-core Thermolite® EcoMade fibers are used in a grid-pattern fleece for maximum warmth retention
  • Drawcord footbox can be opened or closed for optimal comfort and integrates perfectly with the footbox of our Free-Flow Zip system in select Sea to Summit sleeping bags
  • HeiQ Fresh odor control technology helps keep the liner fresh even after extended use
  • A mummy shape designed for maximum thermal efficiency and includes shoulder zippers and footbox drawcord for additional temperature regulation
Free U.S. delivery · No order minimum
Processing: 1–3 business days
Estimated total delivery: 5–8 business days · 30-day returns
SKU: N26C-10-83FCBE96047F Category:
A CLOSER LOOK

Product details

The Reactor Fleece Liner built from hollow-core Thermolite® Pro fibers used in a grid-pattern to deliver our warmest sleeping bag liner and the core of any quality cold weather sleep system. You can regulate your temperature using the shoulder zippers and drawcord footbox, which also align perfectly with the Free Flow-Zip system of Sea to Summit sleeping bags. The versatile Reactor Fleece Liner delivers comfort across multiple seasons or can even be used as a stand-alone sleeping bag in warm weather. Additionally, the drawcord footbox offers plenty of ventilation and the versatility of walking around camp while still wearing your liner if needed.
Features
Thermal boost to retain heat and warmth, as the core of your sleep system the Reactor liner extends the performance of your sleeping bag and sleeping mat in the coldest of conditions
Hollow-core Thermolite® EcoMade fibers are used in a grid-pattern fleece for maximum warmth retention
Drawcord footbox can be opened or closed for optimal comfort and integrates perfectly with the footbox of our Free-Flow Zip system in select Sea to Summit sleeping bags
HeiQ Fresh odor control technology helps keep the liner fresh even after extended use
A mummy shape designed for maximum thermal efficiency and includes shoulder zippers and footbox drawcord for additional temperature regulation
Sea to Summit Guarantee is offered for the Lifetime of this product

Product specifications

BrandSea to Summit
SizesCompact Mummy with Drawcord, Mummy with Drawcord
SizeCompact Mummy with Drawcord | Mummy with Drawcord
Weight0.422 lbs

Choosing, using and caring for your product

Plan around the conditions you expect and the space you need. Compare actual shelter dimensions, sleeping specifications and packed size; prepare appropriately for weather and terrain.

Read the instructions supplied with your item before first use. Check the components and fitting requirements, and follow the care guidance for the listed materials. Keep the product instructions for future reference.

If a specification is not listed or you need help with a particular application, contact our team before ordering.

Ask us a question ↗

Delivery & FAQs

Where do you deliver?

We deliver within the United States. Standard U.S. shipping is free, with no minimum order amount.

When should I expect my order?

Order processing takes 1–3 business days. Estimated total delivery is 5–8 business days from order placement, including processing and carrier transit. See our Shipping Policy for delivery details and how to contact us about an order.

Can I return an item?

You can request a return within 30 days after delivery. Contact us before returning an item so we can provide the correct instructions. Approved refunds are expected to reach the original payment account within 2–4 business days after approval and issuance. See the Return & Refund Policy for the full conditions.

How do I choose the right option?

Check the product photographs, dimensions, materials and available options. Choose your color, size or specification before adding the item to your cart. If you are unsure, ask our team before ordering.

How can I contact you?

Use the email address or telephone listed in our footer and on the Contact Us page. Include the product name or order number when you need help.