SPH is made up of low viscosity PET and high shrinkage PET composite spinning is a kind of PET and compound spinning bi-component polyester fiber, using the different shrinkage of bicomponent form permanent stretch curly structure. SPH Yarn had almost no elasticity with ordinary polyester silk before processing, but after high-temperature dyeing and washing treatment, permanent crimp was generated, which would make the fabric elastic. With excellent elasticity and elastic resilience, the unique feel and luster, fight corrupt fleeciness, sunlight resistance to chlorine resistance, moisture absorption fast dry well. After processing into fabrics, the cloth surface is smooth and smooth, with good drape, anti-wrinkle and non-ironing, stable size, moisture absorption and quick drying, moderate elasticity, and comfortable to use