What are the G-Form bike shoe insoles? The G-Form bike shoe insoles have been specifically designed with a medical grade gel to reduce vibration & pressure whilst cycling. The shoe insoles feature Ortho Lite foam technology, which allows air to circulate around your foot, meaning your foot is kept cooler inside the shoe. Ortho Lite foam also has an anti-microbial formulation to help prevent bacteria, fungus & odour developing in your bike shoe & because the insoles are lightweight it means you can still reach your optimum performance without adding any extra weight to your shoe. When can I use the G-Form bike shoe insoles? Use the G-Form bike shoe insoles during cycling to significantly dampen vibration & reduce pressure. They are also easy to fit inside your bike shoe too; simply remove the existing insole from your shoe, align the G-Form insole with the old insole & trim around the forefoot & toe area to match the existing size of the old insole. Then insert the insole into your bike shoe & align the G-Form anti-vibe gel zone over the cleat area. How do the G-Form bike shoe insoles work? The G-Form bike shoe insoles feature G-Form anti-vibe gel, which has been specifically made to disrupt the energy transfer of the vibrations that are created from the road & from travelling through the pedal & into your foot. This also reduces pressure on the foot where the cleat meets the pedal. The technology found in the G-Form insoles will help to lower numbness & pain that can form in the ball of your foot & toes & therefore helping to improve your cycling performance. With unique spring-back technology your G-Form insoles wont flatten out & will keep over 95% of their thickness. What sizes are available? UK 3-5 EU 35.5-38 UK 6-8 EU 39-42 UK 9-11 EU 43-46 UK 12-14 EU 47-49.5 Shoe Size Conversion Chart