DOCTOR HOY’S™ Natural Pain Relief Gel combines Arnica, a powerful, natural anti-inflammatory, with Camphor and Timed Release Menthol for deep pain relief from arthritis, sprains, muscle strains, backaches and joint pain. Dries clean with no oils and has a vanishing scent. DOCTOR HOY’S™ is safe for repeated use and relief lasts for hours. Great for on-the-go pain relief. Perfect for airline travel.