# Sleeping bag liner SEA TO SUMMIT Reactor Lightweight L — breathable thermal insert, pewter

**URL:** https://aio.lv/en/product--sea-to-summit-9327868169764--12372847
**Data updated:** 2026-04-26 20:45 (EEST)
**Category:** Sleeping Bags
**Manufacturer:** SEA TO SUMMIT
**Manufacturer code:** 9327868169764
**EAN:** 9327868169764
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 37.49 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 30.98 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sea-to-summit-9327868169764--12372847

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | 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 Lightweight L is a sleeping bag liner designed to add thermal performance and hygiene to a sleeping system. The lightweight, breathable insert increases warmth by trapping body heat, protects the sleeping bag from moisture and dirt, and is suitable for backpacking, travel and three-season camping. Color: pewter. Size: L.

## Long description

The SEA TO SUMMIT Reactor Lightweight L is a breathable thermal sleeping bag liner designed to increase the overall warmth and hygiene of a sleep system. Made to fit inside a wide range of sleeping bags, this pewter-coloured liner is lightweight and packs small, while its fabric structure traps body heat to add insulation without bulk. It is intended for backpacking, travel and three-season camping where extra warmth and a clean sleeping surface are needed.
Advantages
The Reactor Lightweight L adds measurable thermal performance by creating an air gap that traps warm air next to the body, improving the effective temperature range of an existing sleeping bag. The breathable fabric supports moisture management, helping reduce condensation and keeping the bag drier. Its lightweight construction and compact pack size make it suitable for multi-day trips where minimizing weight and volume are important. The liner also protects the interior of a sleeping bag from sweat and dirt, simplifying cleaning and extending the bag’s usable life.
Suitable for
 Backpacking trips where reduced weight and increased warmth are desired
 Travel and hostel stays to provide a hygienic sleeping layer
 Three-season camping when extra insulation is needed without adding bulk
 Using in combination with a down or synthetic sleeping bag to widen temperature range
When it may not be suitable
This lightweight liner is not intended to replace a suitably rated cold-weather sleeping bag for extreme winter conditions; it provides incremental warmth but cannot substitute for a high-insulation bag. If you require a fully weatherproof or heavily insulated single-layer sleeping solution in sub-zero environments, a dedicated winter bag or additional insulating systems would be more appropriate.
Key specifications
 Type: breathable thermal sleeping bag liner
 Intended use: adds insulation and hygiene to an existing sleeping bag
 Weight class: lightweight (designed for minimal pack weight)
 Fit: Large size suitable for standard adult sleeping bags
 Colour: pewter
 Packability: compressible to a small volume for backpacking and travel
 Material characteristics: breathable fabric that traps body heat and manages moisture
How to use
Insert the Reactor Lightweight L inside your sleeping bag so that the wider section aligns with the torso area and the narrower end follows the footbox shape. Ensure the liner is spread evenly inside the bag without excessive folds to maintain comfort and thermal efficiency. Use the liner alone in mild conditions or combined with your sleeping bag to increase warmth; it can be removed or adjusted during the night to regulate temperature. After use, air the liner and follow care instructions on the manufacturer label for washing and drying.
What to consider before purchase
 Confirm that the Large size fits your sleeping bag and body dimensions
 Decide whether you need a lightweight liner for added warmth or a thicker model for colder conditions
 Ensure the pewter colour and materials meet your preference for appearance and feel
 Consider packing volume and weight for your intended trips
Usage recommendations
For best results, use the Reactor Lightweight L inside a sleeping bag with a compatible shape and size; combine with a suitable sleeping pad to reduce heat loss to the ground and improve overall comfort and insulation during backpacking or travel.

## FAQ

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

The price is 37.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 14 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 30.06.2026 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/12372847/68741302_large.webp