Kiierr Laser Hair Caps use low-level laser light therapy to improve cellular respiration and function by stimulating the hair follicle cells. Better breathing cells make for a better functioning hair follicle and happier, healthier hair! Kiierr Cap is backed by experts in the fields of science, medicine and technology. Optimal power and ease of use are at the heart of our cutting-edge technology, giving our patients the best possible hair growth results. The Kiierr Cap is worn 30 minutes every other day, with new hair growth potentially becoming noticeable in as little as 10-12 weeks. It can also be used in conjunction with other treatments, such as PRP (platelet rich plasma) therapy, hair transplantation and others.