Sph is a new type of composite fiber. It is made by parallel spinning of PTT and PET polyester compounds with different thermodynamic properties. It is a bit like T400 elastic fiber. Its tensile resilience can be close to spandex, and elasticity. Durability is superior to spandex, and it has excellent dyeing and good color fastness. 80D is the thickness of the yarn is 80D, the fabric is twill structure