Sea to Summit Spark Women's Down Sleeping Bag
Sea to Summit

Sea to Summit Spark Women's Down Sleeping Bag

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Spark Women's Down Sleeping Bag
Spark Women's Down Sleeping Bag
850+ Fillpower Goose Down · Women's Specific Fit · 3 Temps · 2 Sizes

The Women's Spark is an ultralight down sleeping bag built around a women's-specific shape, narrower at the shoulders and wider through the hips for natural side-sleeping comfort. Available in three temperature ratings from summer through winter, it delivers the warmth-to-weight of the standard Spark with extra insulation where women typically need it most.

Women's-Specific Fit
Body-mapped shape reduces excess fabric at the shoulders to cut weight, while a wider hip-to-knee cut allows natural side-sleeping positions.
More Down Where It Counts
Insulation is distributed to provide additional warmth in areas where women typically sleep colder, improving real-world thermal efficiency.
High Fillpower Down
RDS-certified 850+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance and moisture resistance.
Featherweight Fabrics
Super-breathable 10D nylon liner sits comfortably against skin, while a 10D shell with non-PFAS DWR plus water-repellent hood and footbox fabric sheds wind and condensation.
Technical Hood and Footbox
Seals in warmth at the head and feet without the claustrophobic feel of some ultralight bags.
Baffle Construction by Temperature
Sewn-through baffles keep weight down for the 45°F summer bag; hybrid box baffles in the torso and sewn-through in the legs handle the 30°F; full box baffles for the 15°F winter bag.
Pairs with Unisex Spark
Full-length zipper models zip together with an equivalent Unisex Spark to share warmth across a couple's quilt-and-bag setup.
Temperature Variants
45°F / 7°C
Regular · Long
30°F / -1°C
Regular · Long
15°F / -9°C
Regular · Long
Weight (Total)
45°F Regular
382 g / 13.5 oz
45°F Long
432 g / 15.2 oz
30°F Regular
584 g / 20.6 oz
30°F Long
639 g / 22.5 oz
15°F Regular
930 g / 32.8 oz
15°F Long
1,027 g / 36.2 oz
Fill Weight
45°F Regular
200 g / 7.05 oz
45°F Long
230 g / 8.11 oz
30°F Regular
375 g / 13.23 oz
30°F Long
430 g / 15.17 oz
15°F Regular
685 g / 24.16 oz
15°F Long
780 g / 27.51 oz
Compressed Volume
45°F Regular
2.9 L
45°F Long
3.0 L
30°F Regular
4.7 L
30°F Long
5.7 L
15°F Regular
8.0 L
15°F Long
10.0 L
Temperature Rating (Women's ISO Comfort)
45°F Variants
7°C / 45°F
30°F Variants
-1°C / 30°F
15°F Variants
-9°C / 16°F
Recommended User Height
Regular
up to 170 cm / 66.9 in
Long
up to 185 cm / 72.8 in
Materials
Shell
100% Nylon (10D, non-PFAS DWR)
Lining
100% Nylon (10D)
Insulation
RDS-certified 850+ Fillpower Goose Down, 90/10, non-PFAS Ultra-Dry Down treated
Stuff Sack
100% Nylon (excluding trims)
Zippers
YKK #5 with zipper plow
What's Included
In Box
Compression stuff sack, storage cube

Store uncompressed in a dry, breathable bag between trips to preserve down loft.

Spot-clean the shell with mild down-safe soap; air dry thoroughly before packing.

For full washes, use a front-loading washer on gentle cycle with a down-specific detergent; tumble dry on low heat with clean tennis balls to break up down clumps.

Avoid prolonged direct sunlight and high heat to protect the DWR treatment.

Shipping Policy

Components:

All component items (wheels, drivetrains, suspension, brakes, etc.) ship within 2-5 business days of purchase.

Bicycles:

Complete bikes typically ship within 2–3 weeks due to build, tuning, and inspection times. You will receive tracking information as soon as your order is ready to ship.

Riding Gear & Apparel:

Riding gear and apparel orders (helmets, jerseys, gloves, etc.) ship within 2-5 business days.

Returns & Exchanges:

If you received the wrong size or wish to exchange an item, it must be returned in original condition—unused, uninstalled, and with all packaging intact.

For full details, please see our Refund Policy before initiating a return.

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Prepared with intention.

Every product is carefully inspected and handled by our team before it ships. From fit and function to final details, we make sure each piece is ready for the outdoors ahead—so you can focus on the experience, not the gear.

Passion drives us

At SpokeX Bike Co., bikes aren't just our business — they’re our way of life. As a rider-owned and operated shop, every decision we make comes from firsthand experience on the trail, at the race, and on the open road. We know what it’s like to chase a new line, push through the pain cave, and celebrate the ride — because we live it every day.

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