Genuine Vegetable-Tanned Leather:Unlike other production methods, the leather of Handarte Insoles is processed with Chestnut and Quebracho wood powder for a month.Active Carbon Layer:The leather absorbs sweat and traps it in the active carbon part, preventing bacterial growth. Thus, it prevents foot odor in the feet.Sweat Absorbent: to the bigger pore size on the goat skin and vegetable tanning method, its pores can absorb sweat at . Sweat absorption occurs instantly, and you do not feel wetness on your feet.Foot Odor-Eater:Vegetable tannins and dryness on the feet, to the sweat-absorbent feature, prevent bacterial growth on the feet. Recyclable & Environmental Product:The package and the product are environmentally recyclable.How to use Handarte Insoles:For arch-supported orthotic insoles, remove the existing insole and insert them.How to Work:Durable hard cushion support under the insole helps to reduce the complication effect of foot health problems, which absorbs the shock and distributes the pressure equally to the foot.Renew Handarte Insoles:As the color darkens, it is understood that the pores are completely filled and do not work very well.