Sea to Summit Spark Pro 900+ Down Sleeping Bag
Sea to Summit

Sea to Summit Spark Pro 900+ Down Sleeping Bag

$549.00
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Spark Pro Down Sleeping Bag
Spark Pro Down Sleeping Bag
900+ Fillpower Goose Down · 2 Temp Ratings · 2 Sizes · Lightweight

The Spark Pro is an ultralight down sleeping bag optimized for comfort and versatility, with the ability to open flat as a quilt when conditions warm up. It pairs high-lofting goose down with a draft collar and additional ventilation zippers, making it well-suited for shoulder-season and winter backcountry trips.

Highest Fillpower in the Spark Line
RDS-certified 900+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment delivers top-tier warmth-to-weight and loft recovery.
Free-Flow Zip System
Three zipper points — main side, shoulder, and footbox — let you vent heat from the top, bottom, or sides, or open the bag flat as a quilt.
Snag-Free Main Zipper
YKK #5 side zipper with zipper plow operates reliably even with mittens on in cold weather.
Strategic Baffle Construction
Vertical chest baffles lock in warmth where it counts; horizontal baffles in the lower half and base; full box-wall construction throughout for maximum thermal efficiency.
Front Draft Collar
Fitted at the neck and oversized across the shoulders to seal in warmth without restricting movement.
Generous Mummy Cut
A roomier shape than the standard Spark gives you space to shift and sleep on your side, without carrying the weight of extra fabric.
Pairs with Women's Spark
Zips together with a Women's Spark to share warmth across a couple's quilt-and-bag setup.
Temperature Variants
30°F / -1°C
Regular · Long
15°F / -9°C
Regular · Long
Weight (Total)
30°F Regular
619 g / 21.8 oz
30°F Long
672 g / 23.7 oz
15°F Regular
784 g / 27.7 oz
15°F Long
861 g / 30.4 oz
Fill Weight
30°F Regular
310 g / 10.93 oz
30°F Long
356 g / 12.56 oz
15°F Regular
480 g / 16.93 oz
15°F Long
504 g / 17.78 oz
Compressed Volume
30°F Regular
5.3 L
30°F Long
5.5 L
15°F Regular
7.0 L
15°F Long
7.7 L
Temperature Rating (ISO Lower)
30°F Variants
-1°C / 30°F
15°F Variants
-9°C / 16°F
Recommended User Height
Regular
up to 185 cm / 72.8 in
Long
up to 198 cm / 78.0 in
Materials
Shell
100% Nylon (10D, non-PFAS DWR)
Lining
100% Nylon (10D, breathable)
Insulation
RDS-certified 900+ Fillpower Goose Down, 90/10, non-PFAS Ultra-Dry Down treated
Stuff Sack
100% Nylon (excluding trims)
Zippers
YKK #5 main with plow; YKK #3 footbox and shoulder
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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