Sea to Summit

Reactor Mummy Liner (Thermal Boost + 12%)

Sale price€79.99
In stock (14 units), ready to be shipped
Reactor Extreme Liner: Provides a 15% thermal boost for enhanced warmth and comfort in cold conditions.

The Sea to Summit Reactor Extreme Liner offers a 15% thermal boost, making it an essential addition to your camping gear. Ideal for backpacking and camping in cold conditions.


  • Provides a thermal boost of up to 15%
  • Made from stretchy Thermolite® Pro fabric
  • Utilizes Infrared Technology for increased warmth without added weight
  • Lighter and more packable than fleece
  • Technical mummy shape with a drawstring hood
  • Machine washable, no special soap needed
  • HEIQ Fresh bio-based treatment for odor control
  • Keeps sleeping bag clean
  • Packs into its own Ultra-Sil stuff sack
ADDED WARMTH Up to 6% in a 3-season bag and +12% in a 1-season bag
BEST USE Backpacking, Camping
COMES WITH Ultra-Sil stuff sack
MATERIAL(S) 50% Thermolite Pro & 50% Thermolite EcoMade
DIMENSIONS 216 x 80 cm
PACKED SIZE 12 x 15 cm
WEIGHT 284 g
Care Instructions:

Washing: Machine wash with standard detergent. Avoid fabric softeners and dryer sheets.
Drying: Air dry or tumble dry on low heat.
Storage: Store in a cool, dry place, avoiding direct sunlight.
Maintenance: Inspect regularly for wear and tear. Repair any damage promptly.


€5.95 Delivery, Free over €75
Standard Delivery within 1-2 days with An Post priority parcel: €5.95

Delivery Info


Returns Policy
Returns Accepted within 28 days. Exclusions apply.

Returns Info

Fast & Efficient Returns
Quick, Low-cost returns with An Post.

Free Delivery over €75
To all 32 counties in Ireland.

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Sea to Summit

Sea To Summit offer lighter, better performing outdoor & camping gear for every adventure, from high-altitude backpacking expeditions to family car camping. With highly durable options and a lifetime guarantee, they are sure to perform.

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