Can I wash my Ultra-Cool Pillow? August 12, 2020 12:56 The cover of your Ultra-Cool pillow should be spot cleaned only and left to air dry. Do not machine wash. Related articles What is the Ultra-Cool Pillow's loft? What is the Helix Ultra-Cool Pillow made of? Can I wash my Adjustable Pillow? How will the Adjustable Pillow work for me? What is the Down & Feather Pillow's loft?