The arch support of the insoles are made of high grade EVA and soft memory foam & high quality fabric breathable cover are absorbs sweat.<p> <b>Anti-compression deformation:</b> Ultra-high density materials have the ability to resist compression and abrasion.<p> <b>Soft and comfortable:</b> no plasticizer, no shrinkage due to long-term use, and long-lasting softness and elasticity.<p> <b>Size:</b>S/M/L<p> <b>Q&A:</b> <p>1.Do I need to remove the soles of my shoe to replace with this insole?<br> Yes,you’d better remove the original soles for the best fit, just one insole is enough.<p> 2.Do these run large or small?<br> True to size.<p> 3.What kind of shoes is suitable for this insoles?<br> It is designed for work boots, sports shoes, business dress shoes etc.<p> 4.How do you clean them? Can you put them in washing machine?<br> Hand wash with water, dry naturally. It can't be machine-washed