Breathable warm fabric and Rubber sole Rubber sole Professional Lightweight Design: Breathable upper and anti-slip soft rubber sole. Easy Care: Machine wash or hand wash.does not contain glue,safe and reliable. Non-Slip Performance: Use specially designed and extremely non-slip rubber sole to ensure the safety. Breathable And Cozy: Cushioned memory insoles is provided with venting holes to keep your feet comfortable. Versatile Design: Suitable for indoor and outdoor, such as drive, yoga,bedrooms,,camping,exercise,dancing class, parks,etc.