Red Light Therapy Cap for Hair Regrowth TreatmentAdjustable for Every Head Engineered with 3 stage FlexFit bands, our cap seamlessly adapts from 19. 7" to 31. 5" (50 80cm) to cradle all head shapes. No more squeezing or slippingjust perfect alignment for optimal light delivery. 3+1 Photon Control Switch between 660nm (surface revive), 850nm (deep activate), dual wave synergy, or breakthrough SmartPulse modetap to boost nutrient absorption 40% faster with 5Hz rhythmic waves. Salon level results at