# Sleeping bag liner SEA TO SUMMIT Reactor Midweight L - beluga

**URL:** https://aio.lv/en/product--sea-to-summit-9327868169818--12372851
**Data updated:** 2026-04-26 20:45 (EEST)
**Category:** Sleeping Bags
**Manufacturer:** SEA TO SUMMIT
**Manufacturer code:** 9327868169818
**EAN:** 9327868169818
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 42.99 €
**Prices and availability valid until:** 2026-07-24 23:59
**Price without VAT (21%):** 35.53 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sea-to-summit-9327868169818--12372851

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Tuesday | free |
| Pickup points | 03.07.2026 | 1.89 EUR |
| Courier delivery to door | 03.07.2026 | 4.99 EUR |

## Summary description

SEA TO SUMMIT Reactor Midweight L is a sleeping bag liner designed to increase warmth and hygiene inside compatible sleeping bags. Midweight insulation provides extra thermal boost without bulk; the L size fits larger or long sleeping bags. Lightweight and packable, it’s suitable for backpacking, camping, and multi-night trips where added warmth or protection is needed.

## Long description

SEA TO SUMMIT Reactor Midweight L - beluga is a sleeping bag liner engineered to increase thermal performance and hygiene inside compatible sleeping bags. Made from insulating, lightweight materials, the midweight Reactor liner provides an extra warmth layer without significantly increasing bulk or pack size. The L size accommodates larger or long sleeping bags and users who prefer more interior space. The neutral beluga colour offers unobtrusive styling for outdoor and travel use.
Advantages
The Reactor Midweight L enhances overall warmth by adding an insulating layer between the sleeper and the main sleeping bag, helping extend its usable temperature range. Constructed to be lightweight and compressible, the liner packs small for backpacking and travel. It also acts as a hygiene barrier that is easier to wash than a full sleeping bag, and it is designed for compatibility with a wide range of sleeping bag shapes and zippers.
Suitable for
Backpacking trips where lightweight additional warmth is required
Car camping and multi-night trips to protect sleeping bags from sweat and dirt
Cold-weather travel where a midweight thermal boost is needed without a heavier bag
Tall or larger users who need an L-size liner for better fit
When it may not be suitable
The Reactor Midweight L is not intended to replace a purpose-built cold-weather sleeping bag; it is an insulating liner designed to supplement warmth rather than provide standalone extreme cold protection. Users requiring maximal thermal performance in sub-zero conditions should rely on a suitable sleeping bag rated for those temperatures rather than only a liner.
Key specifications
Insulation level: midweight thermal boost
Size: L (sized for larger or long sleeping bags)
Colour: beluga
Weight: lightweight and packable construction
Compressibility: designed to pack small for travel and backpacking
How to use
Place the Reactor Midweight L inside a compatible sleeping bag so that the liner lies flat against the interior shell. Align the liner with the sleeping bag’s zipper and footbox area to ensure full coverage; some sleeping bags allow attachment using internal loops or by tucking the liner in place. Use the liner alone in mild conditions for added hygiene or combine it with a sleeping bag to increase warmth. After use, air out the liner and follow the manufacturer’s washing instructions to maintain insulation and hygiene.
What to consider before purchase
Compatibility with your sleeping bag shape and zipper configuration
Whether a midweight insulation level provides the thermal boost you need for your typical conditions
Size requirements — choose L for larger or long sleeping bags and taller users
Care and washing needs to maintain hygiene and insulation performance
Usage recommendations
For best results, combine the Reactor Midweight L with a sleeping bag whose temperature rating is close to your expected conditions; the liner will raise comfort and warmth without significantly increasing pack weight. Pack the liner in a compression sack when backpacking and launder according to care instructions between extended trips.

## FAQ

### How much does the SEA TO SUMMIT Reactor Midweight L sleeping bag liner cost, and is it available for purchase?

The price is 42.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on Tuesday at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All SEA TO SUMMIT products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized SEA TO SUMMIT service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12372851/68741293_large.webp