The Sea To Summit Reactor Inner Sleeping Bag is a high-performance sleeping bag liner crafted from Thermolite fabric, renowned for its excellent insulating properties.

Designed to significantly enhance your sleeping comfort, this liner is capable of adding up to 8 degrees Celsius to your existing sleeping bag, making it an indispensable addition for colder environments. Its mummy shape and hood drawstring ensure a snug fit, optimizing heat retention and minimizing heat loss.

Remarkably lighter than fleece, this liner offers an unbeatable combination of warmth and lightness, making it a top choice for backpackers and travelers seeking minimal weight without sacrificing warmth.

Additionally, the liner's stretchy material not only provides a comfortable night's sleep by accommodating movements but also facilitates easy packing into the included sack, ensuring it takes up minimal space in your pack.

This blend of lightweight, stretchability, and exceptional thermal efficiency makes the Sea To Summit Reactor Inner Sleeping Bag an essential piece of gear for any outdoor enthusiast.