Sea To Summit Reactor Extreme Sleeping Bag Liner breathable the Siena Hat is ready

the Siena Hat is ready for adventure

this is our go-to vest to keep us warm and dry on early morning boat rides or as a midlayer when the temperature drops

Rocker profile for smoother

Designed for all-day comfort on moderate routes

Compatible with:

Sea To Summit Reactor Extreme Sleeping Bag Liner breathable the Siena Hat is readyAn essential component in your sleep system, the Reactor Extreme liner with Thermolite Pro fabric utilises innovative infra red absorbing ceramic pigments to give your system the thermal boost needed in colder weather adventures. The soft, wicking stretch knit fabric provides unmatched comfort and freedom of movement while still allowing the Reactor Extreme liner to fit any sleeping bag. Additionally, the drawcord footbox offers plenty of ventilation