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Spark Down Sleeping Bag

Name: Spark Down Sleeping Bag
Brand: Sea to Summit
Price: 349 USD
Availability: InStock
Rating: 4.8 (764 reviews)

4.8 · 764 reviews via Shopify’s catalogSource: Sea to Summit North America · checked Oct 15, 2026

In stock

Spark Down Sleeping Bag 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 model can be zipped to an equivalent Women's Spark for comfort that couples can share Tech Specs Materials Shell: 100% nylon Lining: 100% nylon Down Fill: 90/10 Goose Down Stuff Sack: 100% nylon - excluding trims Insulation RDS-certified, 850+ fillpower goose down with a non-PFC Ultra-Dry Down treatment Specifications by Temp Rating & Size Temp Rating & Size Weight Packed Weight Dimension Packed Size Compressed Volume Length Recommended User Height Fill Weight Temp Rating (ISO Lower) Temp Rating (ISO Comfort) 45°F / Regular 363 g | 12.8 oz 398 g | 14.0 oz 196 x 77.5 cm | 77.2 x 30.5 in 23 x 12.5 x 9 cm | 9 x 5 x 4 in 2 L 196cm | 77in 185 cm | 72.83 in 150 g | 5.29 oz 7 °C | 45 °F 11 °C | 52 °F 45°F / Long 387 g | 13.7 oz 422 g | 14.9 oz 211 x 82.5 cm | 83.1 x 32.5 in 24 x 15 x 10 cm | 9 x 6 x 4 in 2.9 L 211cm | 83in 198 cm | 77.95 in 172 g | 6.07 oz 7 °C | 45 °F 11 °C | 52 °F 30°F / Regular 493 g | 17.4 oz 558 g | 19.7 oz 196 x 77.5 cm | 77.2 x 30.5 in 34 x 19.5 x 13.5 cm | 13 x 8 x 5 in 4.5 L 196cm | 77in 185 cm | 72.83 in 265 g | 9.35 oz -1 °C | 30 °F 4 °C | 39 °F 30°F / Long 536 g | 18.9 oz 601 g | 21.2 oz 211 x 82.5 cm | 83.1 x 32.5 in 34 x 19.5 x 13.5 cm | 13 x 8 x 5 in 5.1 L 211cm | 83in 198 cm | 77.95 in 305 g | 10.76 oz -1 °C | 30 °F 4 °C | 39 °F 15°F / Regular 730 g | 25.7 oz 808 g | 28.5 oz 196 x 77.5 cm | 77.2 x 30.5 in 41 x 22.5 x 15.5 cm | 16 x 9 x 6 in 6.8 L 196cm | 77in 185 cm | 72.83 in 480 g | 16.93 oz -9 °C | 16 °F -2 °C | 28 °F 15°F / Long 786 g | 27.7 oz 864 g | 30.5 oz 211 x 82.5 cm | 83.1 x 32.5 in 41 x 22.5 x 15.5 cm | 16 x 9 x 6 in 7.6 L 211cm | 83in 198 cm | 77.95 in 540 g | 19.05 oz -9 °C | 16 °F -2 °C | 28 °F 15°F / Double 1543 g | 54.4 oz 1638 g | 57.8 oz 211 x 134 cm | 83.1 x 52.8 in 46 x 27.5 x 18 cm | 18 x 11 x 7 in 14.3 L 211cm | 83in 198 cm | 77.95 in 985 g | 34.74 oz -9 °C | 16 °F -2 °C | 28 °F 0°F / Regular 1113 g | 39.3 oz 1208 g | 42.6 oz 196 x 77.5 cm | 77.2 x 30.5 in 46 x 27.5 x 18 cm | 18 x 11 x 7 in 9.9 L 196cm | 77in 185 cm | 72.83 in 840 g | 29.63 oz -18 °C | 0 °F -10 °C | 14 °F 0°F / Long 1204 g | 42.5 oz 1299 g | 45.8 oz 211 x 82.5 cm | 83.1 x 32.5 in 46 x 27.5 x 18 cm | 18 x 11 x 7 in 10.6 L 211cm | 83in 198 cm | 77.95 in 945 g | 33.33 oz -18 °C | 0 °F -10 °C | 14 °F Key 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) Available Options Temp Rating 45°F 30°F 15°F 0°F Size Regular Long Double

SizeRegular

Temp rating45°F

$349.00

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Size: Regular

The Coreplex take

The Spark is a lightweight down sleeping bag designed for weight-conscious backpackers, featuring RDS-certified 850 fill-power insulation and water-resistant materials.

850 fill-power down
10D nylon construction
Lightweight design
RDS-certified insulation
3 sizes

Rating

4.8 ★

From 764 reviews

Best for

Ultralight backpacking trips
Weight conscious hikers
Couples sharing compatible bags

Worth knowing

Available in three sizes and four temperature ratings.
Uses non-PFAS treatments for water resistance.
Technical design features a hood and draft tube.

Price & stock: Checked today

The summary is AI-written from the listing and these numbers; confirm details with the seller.

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Details

Key features & specs

RDS certified 850 FillPower goose down. Delivers high warmth and energy return for superior insulation
Non-PFAS Ultra Dry down treatment. Enhances water resistance and environmental sustainability
Technical hood and anatomical footbox. Retain warmth and keep out wind and moisture
10D nylon shell with non-PFAS DWR. Provides lightweight, highly water-repellent protection
Breathable 10D liner fabric. Prevents overheating and sheds wind and condensation

Fill: RDS certified 850 FillPower goose down
Down Treatment: Non-PFAS Ultra Dry
Shell Material: 10D nylon with non-PFAS DWR
Liner Material: 10D nylon
Insulation: RDS certified 850 FillPower goose down with non-PFAS Ultra Dry treatment
Sizes: Regular, Long, Double
Weight: 363 g (Regular), 493 g (Long), 730 g (Double)
Temperature Ratings: 45°F (30°C), 30°F (15°C), 15°F (7°C), 0°F (-18°C), 7°C

Summarized from Shopify’s product catalog. Confirm details with Sea to Summit North America before you buy.

Specifications

Temp rating: 45°F
Size: Regular
Size / pack: Long, Double, Regular

Seller description

Highlights

Compressed Volume 2 L Packed Weight 14.0 oz | 398 g Temperature Rating (ISO Lower) 45 °F | 7 °C Zipper Coupling No Zipper Configuration Half length YKK #5 side zip

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)

Product details

Materials

Shell: 100% nylon; Lining: 100% nylon; Down Fill: 90/10 Goose Down; Stuff Sack: 100% nylon - excluding trims Insulation RDS-certified, 850+ fillpower goose down with a non-PFC Ultra-Dry Down treatment 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 363 g 12.8 oz 387 g 13.7 oz 493 g 17.4 oz 536 g 18.9 oz 730 g 25.7 oz 786 g 27.7 oz 1543 g 54.4 oz 1113 g 39.3 oz 1204 g 42.5 oz Fill Weight 150 g 5.3 oz 172 g 6.1 oz 265 g 9.3 oz 305 g 10.8 oz 480 g 16.9 oz 540 g 19.0 oz 985 g 34.7 oz 840 g 29.6 oz 945 g 33.3 oz Compressed Volume 2 L 2.9 L 4.5 L 5.1 L 6.8 L 7.6 L 14.3 L 9.9 L 10.6 L Temperature Rating (ISO Lower) 7 °C 45 °F 7 °C 45 °F -1 °C 30 °F -1 °C 30 °F -9 °C 16 °F -9 °C 16 °F -9 °C 16 °F -18 °C 0 °F -18 °C 0 °F Women's Temperature Rating (ISO Comfort) 11 °C 52 °F 11 °C 52 °F 4 °C 39 °F 4 °C 39 °F -2 °C 28 °F -2 °C 28 °F -2 °C 28 °F -10 °C 14 °F -10 °C 14 °F Recommended User Height 185 cm 6 ft 1 in in 198 cm 6 ft 6 in in 185 cm 6 ft 1 in in 198 cm 6 ft 6 in in 185 cm 6 ft 1 in in 198 cm 6 ft 6 in in 198 cm 6 ft 6 in in 185 cm 6 ft 1 in in 198 cm 6 ft 6 in in Imperial Metric