Warning: you can feel foot pressure during 3-7 days of wearing. We strongly recommend to start with 2-7 hours a day and gradually increase the time every day. If you are not satisfied with our insoles, we replace or refund shoe insoles. Fit and design for daily use: these insoles for plantar fasciitis are adjustable to work boots. You can also adjust the insole to better fit your shoes and boots. Fit for most shoes such as running shoes, work shoes and boots, high volume dress shoes, hiking shoes. Comfortable material for standing all day long: Poron heel pad excellent for shock absorption and pain relief. The black hard TPU material supports the arch of the foot and surrounds your heel when running or jogging. And good fabric reduces odour formation and keeps feet fresh. Hard and high arch support: Valsole metatarsalgia insoles align your body by supporting the subtalar joint and preventing overpronation or supination. Extra high arch support and deep heel cup structure with maximum cushioning keep the foot bone vertically and in balance to provide stability. Foot pain relief and prevention: orthotic inserts provide rigid arch support, reduce the overextension of plantar fasciitis. Helps relieve stress and pain from flat feet, fallen arches, bunions, back pain and diabetes. Achilles tendonitis and also bunion pain. Provides moderate control and support while working and standing, comfort and cushioning for everyday use.