# Spark SpII Ultralight Down Sleeping Bag: specs and price

**Price (US):** $409 at advnture.com (MSRP per advnture.com review citing Sea to Summit US pricing), as of 2026-06-27. A sourced, dated price of record — other retailers (incl. Amazon) may be lower. Among the 17 sleeping bags we track it is #14 cheapest of 17; category median $200.
**Brand:** Sea to Summit
**Deskmark:** Bronze Deskmark — pay-blind category standing 48/100, #11 of 13 in class (independent, computed from sourced data, never for sale).
**Price tracked since:** June 2026

## Specifications

| Spec | Value |
| --- | --- |
| Price (US) | $409 |
| Brand | Sea to Summit |
| Temperature rating f | 28 |
| Insulation type | down |
| Fill power | 850 |
| Shape | mummy |
| Packed weight (lb) | 1.17 |
| Packed size | 2.5 L (approx. 1-liter bottle size) |
| Zipper side | — |
| Product note | Lower limit 28F / -2C; comfort 38F / 4C; Ultra-Dry Down PFAS-free treatment; regular size; 530 g / 18.7 oz |

## Where it stands

At $409, the Spark SpII Ultralight Down Sleeping Bag is #14 cheapest of the 17 sleeping bags we track, where the median is $249.95. On the spec sheet, its packed weight of 1.17 lb is the lowest of the 13, its temperature rating f of 28 is above the median of the 19, and its fill power of 850 is at the median of the 11.

## Frequently asked questions

**How much does the Spark SpII Ultralight Down Sleeping Bag cost?**

The Spark SpII Ultralight Down Sleeping Bag has a US price of $409 (MSRP per advnture.com review citing Sea to Summit US pricing), as of 2026-06-20.

**How does the Spark SpII Ultralight Down Sleeping Bag compare on price?**

At $409, the Spark SpII Ultralight Down Sleeping Bag is #14 cheapest of the 17 sleeping bags we track, where the median is $249.95.

**What are the Spark SpII Ultralight Down Sleeping Bag's key specs?**

Spark SpII Ultralight Down Sleeping Bag (Sea to Summit): temperature rating f 28, insulation type down, fill power 850, shape mummy, packed weight lb 1.17. Full sourced spec sheet verified 2026-06-20.

Source: https://www.advnture.com/reviews/sea-to-summit-spark-spii-sleeping-bag (advnture.com, accessed 2026-06-20)
Corroboration: https://www.backcountry.com/sea-to-summit-spark-spii-sleeping-bag-35-degree-down (accessed 2026-06-20)
Canonical: https://frontdeskreview.com/product/sleeping-bags/sea-to-summit-spark-spii/
Cite: Per The Front Desk Review, the Spark SpII Ultralight Down Sleeping Bag price of record was $409 as of 2026-06-20 — https://frontdeskreview.com/product/sleeping-bags/sea-to-summit-spark-spii/
License: CC BY 4.0. Price history: https://frontdeskreview.com/data/price-history.jsonl