Use Tech: DeeDee Jonrowe, competing in her 32nd Iditarod, uses a battery-operated heated vest during training. For races in which batteries won't stay charged, she uses chemical warmers for hands, feet and back. To keep his feet warm, Beals adds foam-based snowboarding-style liners and waterproof neoprene covers to his boots.
Go Native: "I've developed most of my clothing from the Native cultures," Jonrowe said. "They've been here thousands of years. I've tried a lot of different insulations, and when it's really storming, I had to go back old-style."
One key piece, she said, is a good fur ruff to protect the face. The beaver fur trim fits close to the face, and you breathe through long wolverine hairs. Combined with goggles and a heavy emollient Jonrowe helped develop, Ididacreme, her face stays protected from frostbite.
Be Innovative: Beals made dozens of fleece neck warmers that he leaves at various checkpoints. The moisture from breath freezes the fleece, so Beals replaces them as often as possible.