1. Materials The high quality microfiber upper is tear resistant and more stable, coupled with a dense breathable hole design, comfortable and breathable, effectively disperse heat and durable without clogging. EVA midsole with rubber outsole design, lightweight cushioning, wearresistant and nonslip. 2. and sturdy: Made of PU infusion wheels, high wear resistance, high elasticity, stable and durable sliding performance. Embroidered steel frame, more stable, load capacity up to 100 kg. 3.TWO IN ONE ROLLER SKATE: This is a multifunctional roller skate that combines walking, skating and sports. With just one step, it transforms into a pulley and then back into a sports shoe. It is versatile and convenient for children and beginners to use. 4.Size Selection Our size is a standard size, you can choose the suitable size according to the size chart, it is recommended to choose according to your current situation. If your feet are slightly wider, it is recommended to choose a larger size. If you prefer to wear loose shoes, it is also recommended to choose a larger size.