Thermarest neoair voyager smokey pine wavecore tm construction and thermacapture tm technology deliver warmth and versatility in a compact durable mattress the voyager mattress boosts the warmth and thickness of our popular neoair venture mattress making it better suited for cold alpine summer nights and trips pushing into spring and fall it combines the patent pending stability and warmth of wavecore tm construction with a reflective thermacapture tm layer for added warmth 25 in