- Size: One size • Invisible height-increasing insoles of 1.5 cm, model 107903 • Soft EVA material with breathable fiber and memory foam for added comfort • Activated carbon fiber helps eliminate odors • Micro-perforated design improves air circulation inside the footwear • Enhance breathability and walking comfort • Can be easily trimmed along the marked contour to fit the shoe size • Fit most shoe styles • Instructions for use: remove the original insoles, place the new ones on top, and trim if necessary • Do not use the original and new insoles together to avoid excess thickness • It is recommended to replace the insoles every three months to maintain foot health