Tips: Not suitable for: High-heeled shoes, diabetic foot, severe foot pain, severe foot deformity, and certain foot injuries or inflammation situations such as fractures, severe sprains, infections, etc. The use of arch support insoles may cause discomfort or worsen symptoms in these cases. Tips: For optimal arch and heel support, we employ sturdy materials and ergonomic design. However, for extremely narrow shoes, the post-wear comfort may be slightly compromised. Tips: No trimming is needed, and you don't even have to remove your old insoles. Please refer to picture 2 or select the appropriate size based on your shoe size. Tips: During the initial 2-5 days of wearing, it is normal to experience some foot pressure as your feet adjust to the arch support. We highly recommend starting with 2-3 hours of usage per day and gradually increg the duration. ?Immediate and All-Day Relief?These insoles offer exceptional comfort and cushioning for all types of leisure or everyday footwear. If you receive an item with a damaged box or pre-owned condition, instead of filing a complaint, please message us and we will promptly resolve the issue. ?Orthopedic & Strong Arch Support?: Our shoe insoles are expertly designed to provide exceptional arch support, helping to alleviate pain and discomfort associated with high arches. They also help keep the foot bones aligned vertically, correct abnormal walking postures. ?Lasting Durability:?Made from high-quality materials,maximum weight capacity of 220 pounds.Our insoles are built to withstand daily wear and tear, offering long-lasting support and comfort.The deep heel cup protects your heel during the impact of walking or running and stabilizes your foot. ?Comfort & Pain Relief?The foot arch support improves the alignment of your feet and legs, redistributes pressure, enhances comfort, and alleviates stress and pain. With these insoles, you can easily endure 8-14 hours of work on concrete floors, relieving lower back pain and fatigue in your feet and legs. Why choose Knicy arch support insoles? Intense work, strenuous exercise, and improper posture can lead to excruciating pain, such as muscle fatigue, plantar fasciitis, high arch, flat feet, pronation, low back/joint/heel spurs pain. Knicy foot insoles are thoughtfully designed to effectively provide support for flat feet and alleviate various foot-related discomforts.