







Fleece sack liner -
The Reactor Fleeceweight Liner from Sea to Summit is a versatile mummy-style sleeping bag liner designed for bivouac and camping in all seasons.
This lightweight and breathable model is perfect for enhancing hygiene and comfort during your outdoor adventures. It provides extra protection against abrasion and moisture, while being easy to carry thanks to its low compressed volume. Its mummy shape fits the body perfectly to limit heat loss.
This sleeping bag liner is easy to use and fits all sleeping bags. Made from technical materials, it ensures durability and comfort, ideal for athletes seeking lightness and practicality, and keeps you warm in any season.


- Temperature gain in the sleeping bag up to +8 °C
- Sleeves for comfort and ventilation
- Fits into all sleeping bags and can be attached to Sea to Summit sleeping bags
- Easy to clean
- Quick drying
- Protects the sleeping bag from moisture and dirt
- Certified recycled material GRS
- Odour control technology HeiQ® Fresh
Composition :
- Fleece Thermolite® EcoMade
| Global recycled standard - GRS | The Global Recycled Standard (GRS) was created to meet the needs of companies wishing to verify the recycled content of their products (finished and intermediate) and to control responsible social, environmental and chemical practices in their production. The GRS standard aims, on one hand, to define the requirements that ensure the accuracy of content claims and the quality of working conditions, and on the other hand, to minimise environmental and chemical impacts. |
| Thermolite® EcoMade | The THERMOLITE® EcoMade technology offers lightweight warmth for all activities. Built with durable functional hollow fibres, this technology is made either from 100% recycled PET bottles or 100% textile waste. |