# Therm-a-Rest Questar Sleeping Bag -18C Adult Down Mummy Bag

**URL:** https://aio.lv/en/product--marmot-231252--12519148
**Data updated:** 2026-06-12 15:41 (EEST)
**Category:** Sleeping Bags
**Manufacturer:** Marmot
**Manufacturer code:** 231252
**EAN:** 0040818131596
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 406.99 €
**Prices and availability valid until:** 2026-08-02 23:59
**Price without VAT (21%):** 336.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--marmot-231252--12519148

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 24.07.2026 | free |
| Pickup points | 29.07.2026 | 1.89 EUR |
| Courier delivery to door | 29.07.2026 | 4.99 EUR |

## Summary description

The Therm-a-Rest Questar is a high-performance down sleeping bag designed for cold-weather camping and trekking. Rated for temperatures down to -18C, this mummy-style bag provides excellent thermal insulation and comfort. It features high-quality down fill, making it lightweight and compressible for easy transport. Ideal for backpackers and outdoor enthusiasts seeking reliable warmth and durability in freezing conditions.

## Long description

The Therm-a-Rest Questar -18C is a high-performance down sleeping bag engineered for cold-weather camping, trekking, and mountaineering. Designed as a mummy-style bag, it provides exceptional thermal efficiency and comfort in freezing conditions. The bag utilizes high-quality, water-resistant down insulation, ensuring it remains lightweight and highly compressible for efficient packing during backcountry expeditions.
Advantages
This sleeping bag features advanced Zoned Insulation, which strategically places fill to maximize warmth while reducing overall weight. The W.A.R.M. fit design offers extra room, allowing for various natural sleeping positions without sacrificing thermal performance. The inclusion of SynergyLink Connectors enables the bag to be integrated directly with a sleeping pad, preventing you from rolling off during the night. Furthermore, the Nikwax Hydrophobic Down treatment ensures the insulation absorbs significantly less moisture and dries faster than untreated down, maintaining its loft even in damp environments.
Suitable for
Cold-weather backpacking and trekking
Winter mountaineering and alpine camping
Outdoor enthusiasts requiring reliable warmth in freezing temperatures
This sleeping bag may not be suitable for extremely humid or wet environments where synthetic insulation might be preferred for its ability to retain heat when completely soaked. Additionally, it may be overkill for mild summer camping where a lighter, less insulated bag would provide better temperature regulation.
Key specifications
Temperature rating: -18C
Insulation: 650 fill Nikwax Hydrophobic Down
Weight: 1.21 kg
Design: Mummy shape with W.A.R.M. fit
Features: SynergyLink Connectors, Toe-asis foot warmer pocket, box baffled construction
Certifications: Responsible Down Standard
To use the Therm-a-Rest Questar, unroll the bag and allow the down to loft fully before use. Use the SynergyLink Connectors to attach the bag to your sleeping pad for a secure sleep system. Adjust the cinchable hood and draft collar to seal in heat, and utilize the Toe-asis pocket to warm your feet quickly. When finished, store the bag in the provided storage sack to maintain the integrity of the down fill.
What to consider before purchase
Ensure the bag length matches your height for optimal thermal efficiency
Check compatibility with your existing sleeping pad width
Consider the intended climate to ensure the -18C rating meets your needs
For long-term storage, keep the sleeping bag in its large storage sack rather than the compression sack to preserve the loft and longevity of the down insulation.

## Specifications

| Feature | Value |
|---|---|
| Type | Walking sleeping bag |
| Weight | 1.21 kg |
| Material | Polyester |
| Product colour | Green |
| Recommended temperature | -18 °C |
| Recommended age group | Adult |

## FAQ

### How much does the Therm-a-Rest Questar -18C Sleeping Bag cost, and is it available for purchase?

The price is 406.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 24.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Therm-a-Rest Questar -18C Sleeping Bag be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Marmot 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 Marmot 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/12519148/68870610_large.webp