Thermarest - Lumbar PillowThermarest Lumbar Pillow Long drives, overnight flights, and hard canoe seats all share one thing in common, and the Therm a Rest Lumbar Pillow addresses it with the same pressure mapping thinking that goes into their sleeping pad lineup. The die cut foam construction removes material down the centre of the pillow to reduce pressure along the spine, while maintaining density along the sides for lateral support. It's a deliberate design based on actual