Refer to Size Chart Heel 1.5centimeters Top Lining: 3mm Foam and Gel Bottom Lining: 5mm Thick Breathable Foam with anti-bacterial & fungicide treatment that prevents odors. Foam pillow relieves the impact while walking and massage the feet. Outer Sole: Rubber Non Slip TR Upper: Italian High Performance Material. As well as being ecologically friendly, it is a material with a classy look, superior in quality and with various benefits. - Lightness: a resistant and extremely light material, weighing 1/3 less than leather, providing comfort while walking.- Multi-functional: uniting softness and durability, it is comfortable and does not lose its shape with use.n>- Versatility: can be given various colors and textures, such as snake skin, crocodile skin, etc.- Ecological: no animals are harmed in the manufacture and its residue can be recycled and reprocessed entirely- Heat comfort: does not allow cold or heat to enter into the inside of the show, maintaining body temperature.- Breathability: allows feet to breath, avoiding the accumulation of moisture.- Antibacterial and bacteriostatic: treatments that ensure the health and hygiene of feet.- Waterproof: prevents water from entering into the shoe. - Curiosity: same material used on the World Cup football and on high-performance sport sneakers.