Reactor Lightweight Sleeping Bag Liner

$64.95

Lightweight and insulative, Thermolite® Pro technology with hollow-core fibers and infrared-absorbing pigments enhances warmth with minimal pack size
Freedom to Move – Stretch-knit and shaped arm openings allow unrestricted movement, providing natural comfort throughout your sleep
Technical Shape and Hood – Ergonomic design with a fitted hood delivers optimal warmth and comfort without extra weight or bulk
Fits any sleeping bag - Stretch fabric means the Reactor Liner fits any shape of sleeping bag
Stay Fresh Longer – HeiQ Fresh odor control technology keeps the liner fresh after extended use

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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-E6B3F1293504 Category: Sleep Systems

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A CLOSER LOOK

Product details

Optimized for minimal weight and maximum warmth, the Reactor Lightweight enhances sleep system performance with advanced Thermolite® Pro fabric, which uses infrared-absorbing ceramic pigments and hollow-core fibers to trap body heat. Adding up to 4°C|7°F of warmth with minimal bulk, it’s ideal for ultralight expeditions. Stretch-knit fabric and articulated arm openings ensure unrestricted mobility. Treated with HeiQ Fresh odor control, it’s quick-drying, machine washable, and helps prolong your sleeping bag’s lifespan by reducing wash frequency.
Features
Lightweight and insulative, Thermolite® Pro technology with hollow-core fibers and infrared-absorbing pigments enhances warmth with minimal pack size
Freedom to Move – Stretch-knit and shaped arm openings allow unrestricted movement, providing natural comfort throughout your sleep
Technical Shape and Hood – Ergonomic design with a fitted hood delivers optimal warmth and comfort without extra weight or bulk
Fits any sleeping bag - Stretch fabric means the Reactor Liner fits any shape of sleeping bag
Stay Fresh Longer – HeiQ Fresh odor control technology keeps the liner fresh after extended use
Sleep System Integration – Snap connectors at the shoulders easily pair with Sea to Summit sleeping bags for quick, hassle-free entry and exit
Easy to Keep Clean – Machine washable construction simplifies care and reduces wear on your sleeping bag over time
Lower Impact Materials – Crafted with certified recycled fibers and bluesign APPROVED materials to minimize environmental impact

Product specifications

Compatibility stated by source	Fits any sleeping bag - Stretch fabric means the Reactor Liner fits any shape of sleeping bag
Materials described by source	ceramic
Brand	Sea to Summit
Materials	ceramic
Sizes	Short, Regular, Long
Size	Short \| Regular \| Long
Weight	0.26 lbs

Reactor Lightweight Sleeping Bag Liner — detail 1 — A closer look at the details

Reactor Lightweight Sleeping Bag Liner — detail 2 — Explore the product from another angle

Reactor Lightweight Sleeping Bag Liner — detail 3 — Details to help you choose

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.

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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?

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