Gel 3 Heights:1cm,2cm,3cm. Size:Small,Large The high quality GEL material is transparent, colorless and crystal clear without any impurities. Using this material, the insole has the function of shock absorption, pressure reduction, anti-slip and stability. Air cushioned caps for comfortable feet Helps reduce foot pain. Helps absorb shocks and prevent injuries. Helps enhance your performance by reducing fatigue. Helps improve self-confidence,increased height but not at the expense of discomfort as is usually the case with high heels. Replace every six months or the first sign of wear.FITS MOST SHOES: Unlike ordinary inner sole, it suitable for most shoes,such as boots, shoes, sports shoes, canvas, high-top shoes, tennis shoes, rubber shoes, etc. Not suitable for low-top shoes.Contouring to the heel for greater support and comfort, each gel heel cup is constructed with a premium, latex-free gel. SUPPORTIVE HEEL PAIN RELIEF: Providing soothing support for the heel and ankle, the gel heel cups effectively reduce foot pain caused by heel spurs, bone spurs tendonitis and plantar fasciitis. Perfect for those on their feet all day, the heel cups elevate the heel to minimize fatigue in the feet, legs and back. RELIEVE TIREDNESS:The shoes insole is comfortable to wear, it can relieve tiredness while you are walking.It;s shock absorption effect will keep your feet healthy.Suitable for Running, Walking,you will feel more comfortable if you wear a sock when wear the shoes insole. TRANSPARENT AND INVISIBLE DESIGN:Invisible three heights,the half insoles are invisible design. Three optional heights are perfect for different occasions, Increase people's self-confidence in conference halls, offices and other public places.you put it into your shoes.Since the shoes insole is invisible. HIGH QUALITY MATERIALS: The thickened insole is made of gel material with good abrasion resistance, good resilience and soft comfort. Good fit, not easy to slide in shoes. The self-adhesive base ensures the heel cups stay firmly in place throughout the day.