We’ve slashed weight and volume wherever we can with the Ultrasphere 1.5, crafting the definitive sleep mat for when every gram counts. It combines an ultralight fabric with a new weight-saving construction that uses innovative offset air chambers to trap heat within the mat, keeping you warm on wild overnights without the need for bulky insulation. Highly comfortable and supportive, the Ultrasphere 1.5 is the ideal foundation for thru-hiking, summer bikepacking, and multi-day mountain runs.
