BSY or bishrinkage yarns are increasingly used in the Burkha fabrics. 
These yarns are a combination of two yarns of different shrinkages combined to create one composite yarn.During processing, Due to differential shrinkage, the high-shrink component shrinks and the low-shrink component comes out of the fabric as micro-loops, giving the fabric excellent texture and handle.This provides the product with a very nice “textured” effect, “peach skin” effect, “brushed” effect or “terry loop” effect, depending on the fabric construction, and the component yarn characteristics, used.

ITY Yarn is an abbreviation for Intermingled textured yarn, also known as BSY (Bi-shrinkage Yarn) . ITY is always created by spinning POY and FDY together, resulting in a yarn with differential shrinkage that is commonly referred to as BSY.

To produce the desired effects, unique yarn components are mixed in a regulated procedure. It does not require any texturizing procedure. But the handle is similar to the fabrics produced from textured yarns. These yarns have now captured a sizable portion of the fabric industry, particularly in women’s clothing.