One Soul for Every Arch Size and Shape Active Sole footbeds are both wear-moldable and heat-moldable, meaning you can customize their fit to your foot in two ways. Wear moldable: Simply insert the insole into your shoes and wear it for a period of time. The base will gradually conform to the shape of your foot through normal use. Heat moldable: You can also heat the insole to speed up the molding process. The instructions typically involve: Preheating an oven to about 200°F (90°C). Placing the insole on a baking sheet in the oven for about 2 minutes until the Opti‑Therm indicator turns black. Removing and place in shoes. Stand up straight in place for 2 minutes while the soles cool and form to your feet. The thin version of our ultra-durable EVA footbed, for slim-fitting footwear. No bulky foam, just the essential support of our signature moldable base. Great for everyday comfort or high-exertion activities. Because we give a scrap.Made with 20% post-industrial recycled EVA. SOLE Thin insoles are best for dress shoes, flats, slim casual sneakers, pickleball shoes, cleats, skates, ski and snowboard boots, and other slim or tight-fitting footwear. Reduces plantar fascia strain Suitable for any arch height Provides lightweight support Improves balance Promotes neutral alignment Distributes weight and pressure evenly Zero drop from heel to forefoot SOLE Signature Shape for everyday comfort Heat and wear moldable for customized support Polygiene StayFresh™ odor prevention Dimensions Width - Forefoot (approx.) Men's 10 - 98mm Women's 7 - 87mm Length - Heel to toe (approx.) Men's 10 - 290mm Women's 7 - 245mm Thickness Cushioning: 0mm Total: 1.6mm