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- USA
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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Sea To Summit Reactor Fleeceweight Liner - RegularBoost your sleep systems warmth with the Reactor Fleeceweight. Thermolite hollow core fibers and grid fleece trap and reflect body heat, adding up to 8C 14F with minimal weight. The stretch fleece and arm openings allow freedom of movement, while snap attachments fit Sea to Summit sleeping bags for easy access. Easy to clean and quick drying, it features HeiQ Fresh odor control. Using a liner reduces sleeping bag washes, helping preserve loft and
Boost your sleep system’s warmth with the Reactor Fleeceweight. Thermolite® hollow-core fibers and grid fleece trap and reflect body heat, adding up to 8°C|14°F with minimal weight. The stretch fleece and arm openings allow freedom of movement, while snap attachments fit Sea to Summit sleeping bags for easy access. Easy to clean and quick-drying, it features HeiQ Fresh odor control. Using a liner reduces sleeping bag washes, helping preserve loft and extend lifespan.
Best Use: Cold-weather backpacking, Ski touring, (Stand-alone) summer use
Features
- Boosts Sleep System Warmth – Reactor Fleeceweight uses Thermolite® hollow-core fibers and grid fleece to trap warmth with minimal added weight
- Freedom to Move – Stretch-knit and shaped arm openings allow unrestricted movement, providing natural comfort throughout your sleep
- Technical Shape and Hood – Ergonomic design with a fitted hood delivers optimal warmth and comfort without extra weight or bulk
- Stay Fresh Longer – HeiQ Fresh odor control technology keeps the liner fresh after extended use
- Sleep System Integration – Snap connectors at the shoulders easily pair with Sea to Summit sleeping bags for quick, hassle-free entry and exit
- Easy to Keep Clean – Machine washable construction simplifies care and reduces wear on your sleeping bag over time
- Lower Impact Materials – Crafted with certified recycled fibers and bluesign APPROVED materials to minimize environmental impact
- Can be used on its own as a lightweight sleeping bag in warm-weather conditions
Tech specs
|
Regular
|
|
|---|---|
| Weight | 14.1oz |
| Dimensions | 76.0 x 31.5 in |
| Packed Size | 5.9 x 9.8 x 5.9 in |
Material(s)
100% Post-Consumer Recycled Polyester; Stuff Sack: 100% Polyester
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
GOOD
Size: Twin, Color: Black
The comforter feels soft and comfortable from the first night. I liked that it keeps you warm without feeling too heavy or overly hot. The color looked just like the pictures and so far it has kept its shape after washing. For the price, the quality felt really good and it gives the bed a clean look.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
perfect for tall people or people who want to feel small
Size: California King, Color: White
The Utopia bed cover in California king size is a total game changer for sleep. I’m a tall guy at 6’8 and finding bedding that actually covers me all the way is a pain, but this cover has plenty of room to spare. It spreads wide across the bed and hangs down nicely on the sides so I don’t wake up with cold feet or shoulders sticking out. The size alone makes it worth it, but the comfort takes it to another level.
The bed cover is super warm without feeling heavy. On cold nights it keeps the chill out fast, and even when the heater’s off I stay cozy all night. The material feels soft and smooth, not scratchy like some other big blankets. It’s got a nice weight that makes it feel snug, but it’s not so thick that you overheat. For someone my height, it’s a relief to finally have something that covers everything without having to tug it around.
The bed cover comfort is amazing after a long day. The bed cover feels soft enough to relax into but still strong and well made, so it doesn’t bunch up or slide around easy. It holds the warmth steady so you stay comfy till morning. The bed cover size means there’s plenty of room to share too, and it still feels like you got your own space.
For the price, the bed cover is a perfect buy. It’s warm, big, and super comfortable, everything you need for a great night’s sleep. If you’re tall or just like extra space and a cozy feel, the bed cover is a great choice. Honestly I can’t find much to complane about, the bed cover just makes sleeping way easyer and way more relaxing.
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Reviewed in the United States on September 24, 2025
★★★★★ 5
Twin Bed Duvet
Size: Twin, Color: White
Very happy with this Duvet. Lightweight and comfy. More than adequate size for twin bed, warm and comfortable.,Good value for money, though may not be suitable for cold climates, Perfect for the Southern States.
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Reviewed in the United States on April 7, 2026
★★★★★ 5
Hotel quality, budget friendly
Size: King, Style: Light
I’ve only used this for several nights. Overall I’m pretty happy with it, especially for the price. It is soft to the touch and has a nice, smooth feel. It’s lightweight but still provides enough warmth for mild to cool nights. I don’t like feeling weighed down when I sleep, so the light fill is actually a big plus for me. If you’re someone who sleeps hot, this is a solid choice. The corner tabs are super helpful. I paired it with a duvet cover and haven’t had issues with shifting or bunching. It also fits my bed well, though I could see it being a bit short on the sides if you have a very thick mattress. This is a great budget-friendly option and seems like it will be easy to maintain.
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Reviewed in the United States on September 19, 2025
★★★★★ 5
A Great Comforter for Everyday Use
Size: Full/Queen, Style: All-Season
I absolutely love this comforter! I love the fact it’s machine washable, and it held up really well after the first wash. It fluffed back up nicely, stayed soft, and didn’t lose its shape. It’s not too heavy but still cozy enough to keep you comfortable. For the price, the quality exceeded my expectations, and I am very happy with this purchase. I highly recommend 😊
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Reviewed in the United States on June 4, 2026
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