Sea to Summit Trek Down Sleeping Bag
Sea to Summit

Sea to Summit Trek Down Sleeping Bag

$444.00
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Trek Down Sleeping Bag
Trek Down Sleeping Bag
650+ Duck Down · 3 Temp Ratings · 2 Sizes · Tapered-Rectangular · Free-Flow Zip

The Trek is a roomy, tapered-rectangular down sleeping bag built for travel, car camping, and comfort-first backpacking — the more spacious alternative to Sea to Summit's technical Ascent line. Available in three temperature ratings and two lengths, it pairs a versatile Free-Flow Zip system with down fill to span cool summer nights through deep winter car camping.

Tapered-Rectangular Comfort Fit
Broader cut than the technical Ascent gives sleepers room to shift, sit up partially, and store a pillow or clothes inside the bag without feeling constricted.
Free-Flow Zip System
Open the bag progressively for ventilation — from arm hole, to full side zip, to flat quilt. Snap the shoulders and open the footbox to wear the bag around camp on warm evenings.
Versatile Temp Range
Three ratings from 30°F down to 0°F cover shoulder-season backpacking, car camping, hut trips, and winter travel without swapping bags.
Duck Down with Damp Resistance
RDS-certified 650+ fillpower duck down with a non-PFAS Ultra-Dry Down treatment holds loft better than untreated down when temperatures swing through dew points and damp mornings.
Recycled Polyester Shell
20D recycled polyester shell with non-PFAS DWR blocks wind and light moisture, and the soft polyester liner sits comfortably against skin or base layers.
Compatible with Women's Trek
Unisex Trek zips to most Sea to Summit Women's sleeping bags, so couples can share warmth across a combined quilt-and-bag setup.
Versatile Use Case
Sits between the ultralight Spark and the technical Ascent — the go-to bag when you want comfort and versatility over minimum weight or technical features.
Temperature Variants
30°F / -1°C
Regular · Long
15°F / -9°C
Regular · Long
0°F / -18°C
Regular · Long
Weight (Total)
30°F Regular
1,119 g / 39.5 oz
30°F Long
1,253 g / 44.2 oz
15°F Regular
1,436 g / 50.7 oz
15°F Long
1,611 g / 56.8 oz
0°F Regular
1,895 g / 66.8 oz
0°F Long
2,098 g / 74.0 oz
Fill Weight
30°F Regular
380 g / 13.4 oz
30°F Long
437 g / 15.41 oz
15°F Regular
635 g / 22.4 oz
15°F Long
735 g / 25.93 oz
0°F Regular
1,000 g / 35.27 oz
0°F Long
1,163 g / 41.02 oz
Compressed Volume
30°F Regular
8.2 L
30°F Long
8.8 L
15°F Regular
10.6 L
15°F Long
12.2 L
0°F Regular
14.2 L
0°F Long
15.9 L
Temperature Rating (ISO Lower)
30°F Variants
-1°C / 30°F
15°F Variants
-9°C / 16°F
0°F Variants
-18°C / 0°F
Recommended User Height
Regular
up to 183 cm / 72.05 in
Long
up to 198 cm / 77.95 in
Materials
Shell
100% Recycled 20D Polyester (non-PFAS DWR)
Lining
100% Polyester
Insulation
RDS-certified 650+ Fillpower Duck Down, 80/20, non-PFAS Ultra-Dry Down treated
Stuff Sack
100% Nylon (excluding trims)
Side Zipper
YKK #3, full length, two sliders
Foot Zipper
YKK #5
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.

Stuff a dry camp shirt or pillow into the hood for extra warmth on cold nights.

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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