DESCRIPTION FootActive Comfort NHS-APPROVED Premium Insoles. These Full-Length, Arch Support Orthotic Insoles are proven to Help Reduce your Heel Pain, Plantar Fasciitis, Knee Pain, Back Pain and Achilles Tendonitis. This is a medium density insole which is perfect for everyday/work use. It supports the arch and stabilises the foot whilst also cushioning the heel. Perfect for Flat Feet.