• Made of quality silicone material, durable to use
• Thin enough and perfectly fit for your shoe
• It has enough toughness to ensure hard support for the arch curvature, long-standing without pain
• It is an aid for plantar fasciitis/flat feet/fallen arch/high arches/heel valgus/ X/O legs/foot pain, etc
• Suitable for various foot types with indoor flats, gym sneakers, hiking shoes, long-standing worker's martingale boots, etc

Specification:

• Material: silicone
• Size: S: 8.5*4.3cm; L: 9.8*5.7cm