Air-Touch Foam：7or9 thoughtfully used Air-touch Foam in each shoe. The design inspiration was from sneakers, which makes a great difference. All-round coverage for all foot shapes, reducing toe and heel rubs.
 3D Shock-absorbing pad core: Made from 4mm high-resilience eco-friendly blue-dot material

 Shoes insole & lining: lambskin with micro-needle punching, prevents water buildup on the soles of the feet, keeps your feet comfortable and dry.

 Counter Latex Pillow: High-stretchy and breathable, reducing heel rubs.

 Accessories for DIY: Nearly 100 detachable accessories including buckles, laces, back clips, and ankle chains which can be applied to toe, back ankle, and other positions.