# Therm-a-Rest Questar 0F/-18C Down Sleeping Bag

**URL:** https://aio.lv/en/product--oem-231252--12410356
**Data updated:** 2026-05-09 16:34 (EEST)
**Category:** Sleeping Bags
**Manufacturer:** OEM
**Manufacturer code:** 231252
**EAN:** 0040818131596
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 331.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 274.37 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--oem-231252--12410356

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.06.2026 | free |
| Pickup points | 02.07.2026 | 1.99 EUR |
| Courier delivery to door | 02.07.2026 | 4.99 EUR |

## Summary description

The Therm-a-Rest Questar 0F/-18C is a high-performance down sleeping bag designed for cold-weather trekking and mountaineering. Featuring premium insulation, it provides reliable warmth in temperatures down to -18°C. Engineered for comfort and thermal efficiency, this mummy-style bag is ideal for backpackers and outdoor enthusiasts seeking a lightweight yet durable solution for winter camping and alpine expeditions.

## Long description

The Therm-a-Rest Questar 0F/-18C is a high-performance down sleeping bag engineered for cold-weather trekking and mountaineering. Designed to provide reliable warmth in temperatures as low as -18°C, this mummy-style bag combines advanced insulation technology with a spacious fit to ensure comfort during winter camping and alpine expeditions.
Advantages
This sleeping bag features 650 fill Nikwax Hydrophobic Down, which absorbs significantly less water and dries much faster than standard down, all while remaining PFC-free. The specialized W.A.R.M. fit provides extra room for various natural sleeping positions without sacrificing thermal efficiency. Zoned insulation strategically places fill where it is needed most to maximize warmth while keeping the overall weight manageable. The box-baffled construction uses internal mesh walls to maintain loft and eliminate cold spots, while the Toe-asis foot warmer pocket offers an ergonomic space to quickly warm cold feet.
Suitable for
Winter backpacking and trekking
Alpine mountaineering expeditions
Cold-weather camping in sub-zero conditions
This sleeping bag may not be suitable for extremely humid or wet environments where synthetic insulation might be preferred over down, despite the hydrophobic treatment. It is also not intended for lightweight summer travel due to its heavy-duty insulation and bulkier design optimized for extreme cold.
Key specifications
Temperature rating: -18°C
Insulation: 650 fill Nikwax Hydrophobic Down
Weight: 1.21 kg
Fit: W.A.R.M. fit for multiple sleep positions
Construction: Box-baffled with zoned insulation
Integrated features: SynergyLink connectors, Toe-asis foot warmer pocket, draft collar, and draft tube
How to use
To use the sleeping bag, unroll it and allow the down to loft fully before entering. Use the SynergyLink connectors to attach the bag directly to your sleeping pad, which prevents you from rolling off the pad during the night and improves thermal efficiency. Adjust the cinchable hood and draft collar to seal in heat around your head and shoulders. When finished, store the bag in the provided storage sack in a cool, dry place to maintain the integrity of the down fill.
What to consider before purchase
Ensure the bag size matches your height for optimal thermal performance
Check if your sleeping pad is compatible with the SynergyLink connector system
Consider the packed size for your specific backpack capacity
For best results, always store the sleeping bag in its large storage sack rather than the compression sack to prevent long-term damage to the down loft.

## 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 0F/-18C Down Sleeping Bag cost, and is it available for purchase?

The price is 331.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 29.06.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Therm-a-Rest Questar 0F/-18C Down 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 OEM 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 OEM 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/12410356/68707376_large.webp