30°F / Long

30°F || Spark Down Sleeping Bag (0°F - 45°F)

30°F / Long

Ultralight / Backpacking

Spark Down Sleeping Bag

Name: Spark Down Sleeping Bag (0°F - 45°F)
Brand: Sea to Summit
SKU: S2124
Price: 349.0 USD
Availability: InStock
Rating: 4.8 (222 reviews)

$479.00

Temp Rating

45°F
30°F
15°F
0°F
Size

Regular
Long
Double

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Highlights

Best Use: Ultralight Backpacking

Performance: 2 Season

Weight: 1lb 2.9oz | 536g

Compressed Volume: 5.1L

Lower Temp Rating: 30°F | -1°C

Zipper Coupling: Half-Zipper, cannot be zipped to another sleeping bag. Learn more.

Performance

Weight

Ultralight
Lightweight
Midweight

Packability

Ultra Compact
Compact
Midsize

Climate

Warm
Cold
Extreme Cold

About The Product

If you're counting grams, but still count on a great night's sleep, the Spark may be the right bag for you.

Filled with RDS-certified 850+ fillpower goose down treated with a non-PFAS Ultra-Dry Down treatment, the Spark is constructed with a technical hood and zipper draft tube to retain warmth. Comfort comes from a super-breathable 10 Denier liner fabric, while a 10D shell with a non-PFAS DWR plus a highly water repellent hood and footbox fabric shed wind and condensation.

The full-length zipper models can be zipped to an equivalent Women's Spark for comfort that couples can share

Features

RDS-certified, 850+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance
Ultralight, breathable 10D nylon liner and a 10D shell with non-PFAS DWR keeps the hood and footbox highly water resistant
Technical hood, anatomical footbox and an ergonomic mummy shape - ultralight doesn't have to mean ultratight
YKK #5 zippers with zipper plough provide reliable, snag-free operation
Baffle construction specific for each use: Sewn through for lighter weight (7°C|45°F), Hybrid box baffles in torso/sewn through in leg area (-1°C | 30°F) or full box baffles for maximum warmth (-9°C | 15°F)
Zipper length specific for each use: half-length (7°C|45°F and -1°C | 30°F) for ultralight packability; full-length side zip (-9°C | 15°F and -18°C | 0°F)
Sea to Summit Guarantee is offered for the Lifetime of this product

Product Features

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Spark Down Sleeping Bag 30°F / Long

If you're counting grams, but still count on a great night's sleep, the Spark may be the right bag for you.

The full-length zipper models can be zipped to an equivalent Women's Spark for comfort that couples can share

Features

RDS-certified, 850+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance
Ultralight, breathable 10D nylon liner and a 10D shell with non-PFAS DWR keeps the hood and footbox highly water resistant
Technical hood, anatomical footbox and an ergonomic mummy shape - ultralight doesn't have to mean ultratight
YKK #5 zippers with zipper plough provide reliable, snag-free operation
Baffle construction specific for each use: Sewn through for lighter weight (7°C|45°F), Hybrid box baffles in torso/sewn through in leg area (-1°C | 30°F) or full box baffles for maximum warmth (-9°C | 15°F)
Zipper length specific for each use: half-length (7°C|45°F and -1°C | 30°F) for ultralight packability; full-length side zip (-9°C | 15°F and -18°C | 0°F)
Sea to Summit Guarantee is offered for the Lifetime of this product

Design Details

Smallest Packed Size

Ultralight bag compresses down to the smallest packed size to save space in your backpack.

Warmth-to-Weight Ratio

Our best sleeping bag for providing exceptional warmth without the added weight.

Premium Comfort

Comfortable, super-breathable and ultralight 10 Denier liner fabric.

Snag-Free Zipper Plow

YKK #5 zippers with zipper plow provide reliable, snag-free operation.

Technical Features

850+ Loft Ultra-Dry Down

Quiltlock System

Responsible Down Standard (RDS)

Non-PFAS

Tech specs

Best Use

Ultralight Backpacking
Comes With

40D recycled, bluesign APPROVED nylon compression bag
Insulation

RDS certified, 850+ non-PFAS Ultra-Dry Down
Shape

Mummy
Zip Options

YKK #5 zippers with snag free zipper plow

	45°F Regular	45°F Long	30°F Regular	30°F Long	15°F Regular	15°F Long	15°F Double	0°F Regular	0°F Long
Weight	12.8oz 363g	13.7oz 387g	1lb 1.4oz 493g	1lb 2.9oz 536g	1lb 9.7oz 730g	1lb 11.7oz 786g	3lbs 6.4oz 1543g	2lbs 7.3oz 1113g	2lbs 10.5oz 1204g
Fill Weight	5.3 oz 150 g	6.1 oz 172 g	9.3 oz 265 g	10.8 oz 305 g	16.9 oz 480 g	19.0 oz 540 g	34.7 oz 985 g	29.6 oz 840 g	33.3 oz 945 g
Compressed Volume	2.4 L2.4 L	2.9 L2.9 L	4.5 L4.5 L	5.1 L5.1 L	6.8 L6.8 L	7.6 L7.6 L	14.3 L14.3 L	9.9 L9.9 L	10.6 L10.6 L
Compression Sack	2 L2 L	3 L3 L	8 L8 L	8 L8 L	13 L13 L	13 L13 L	20 L20 L	20 L20 L	20 L20 L
Temperature Rating (ISO Lower Limit)	45°F 7°C	45°F 7°C	30°F -1°C	30°F -1°C	15°F -9°C	15°F -9°C	15°F -9°C	0°F -18°C	0°F -18°C
Women's Temp Rating (ISO Comfort)	51°F 11°C	51°F 11°C	39°F 4°C	39°F 4°C	29°F -2°C	29°F -2°C	29°F -2°C	14°F -10°C	14°F -10°C
Fits Up To Height	6 ft 1 in 185 cm	6 ft 6 in 198 cm	6 ft 1 in 185 cm	6 ft 6 in 198 cm	6 ft 1 in 185 cm	6 ft 6 in 198 cm	6 ft 6 in 198 cm	6 ft 1 in6 ft 1 in	6 ft 6 in 198 cm

Frequently Asked questions

Can I open a Spark flat for use as a quilt?

No - the ultralight Spark does not have a footbox zipper. For this feature, see the Spark Pro or Ascent sleeping bags

How much room is there in a Spark?

The Spark is designed to be ultralight, so the fit is a little more snug than a comfort-sleeping bag like the Ascent. But - it is still cut to provide room to move.