Available in 10 sizes from 5-14. HSA/FSA ELIGIBLE. SLEEP INDEX. MOVEMENT INDEX. RECOVERY SCORE. MENSTRUAL & PREGNANCY INSIGHTS. CIRCADIAN PHASE ALIGNMENT. INSIDE THE AIR - 6-day battery life, wireless charging, water resistance up to 100 m. Available in 15 languages - The Ultrahuman App is now available in English, French, Thai, Chinese, Malay, Indonesian...