Product Description
Optimized for minimal weight and maximum warmth, the Reactor Lightweight enhances sleep system performance with advanced Thermolite® Pro fabric, which uses infrared-absorbing ceramic pigments and hollow-core fibers to trap body heat. Adding up to 4°C|7°F of warmth with minimal bulk, it’s ideal for ultralight expeditions. Stretch-knit fabric and articulated arm openings ensure unrestricted mobility. Treated with HeiQ Fresh odor control, it’s quick-drying, machine washable, and helps prolong your sleeping bag’s lifespan by reducing wash frequency.
- Lightweight and insulative, Thermolite® Pro technology with hollow-core fibers and infrared-absorbing pigments enhances warmth with minimal pack size
- 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
- Fits any sleeping bag - Stretch fabric means the Reactor Liner fits any shape of sleeping bag
- 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
- 100% Post-Consumer Recycled Polyester
- Stuff Sack: 100% Polyester
- Dimensions: 70.1 x 31.5 in | 178 x 80 cm
- Packed Size: 3.9 x 7.1 x 3.9 in | 10 x 18 x 10 cm
- Weight: 8.3oz | 235g
Availability & Sizing
Product Details
Price History
Historical Data
Last 1 days of price history
| Date | Low Price | High Price | Average Price | Vendors |
|---|---|---|---|---|
| May 8, 2026 | $64.95 | $64.95 | $64.95 | 1 |
Price Statistics
Description
Optimized for minimal weight and maximum warmth, the Reactor Lightweight enhances sleep system performance with advanced Thermolite® Pro fabric, which uses infrared-absorbing ceramic pigments and hollow-core fibers to trap body heat. Adding up to 4°C|7°F of warmth with minimal bulk, it’s ideal for ultralight expeditions. Stretch-knit fabric and articulated arm openings ensure unrestricted mobility. Treated with HeiQ Fresh odor control, it’s quick-drying, machine washable, and helps prolong your sleeping bag’s lifespan by reducing wash frequency. Lightweight and insulative, Thermolite® Pro technology with hollow-core fibers and infrared-absorbing pigments enhances warmth with minimal pack size 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 Fits any sleeping bag - Stretch fabric means the Reactor Liner fits any shape of sleeping bag 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 100% Post-Consumer Recycled Polyester Stuff Sack: 100% Polyester Dimensions: 70.1 x 31.5 in | 178 x 80 cm Packed Size: 3.9 x 7.1 x 3.9 in | 10 x 18 x 10 cm Weight: 8.3oz | 235g
Additional Info
Vendor Comparison (1 stores)
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| Vendor | Price | Stock | Last Updated | Action |
|---|---|---|---|---|
Sports Basement Best Price | $64.95 | Out of Stock | 5/8/2026 | View Product → |
Available Sizes & Variants (1)
| Variant | Size | Color | Price | Status | Stores | Buy |
|---|---|---|---|---|---|---|
Pewter / Short | Short | Pewter | $64.95 | Out of Stock | 1 store | — |
