Why is my thread bunching underneath?
A: Looping on the underside, or back of the fabric, means the top tension is too loose compared to the bobbin tension, so the bobbin thread is pulling too much top thread underneath. By tightening the top tension, the loops will stop, but the added tension may cause breakage, especially with sensitive threads.
Is spandex material stretchy?
Spandex is a lightweight, soft smooth synthetic fiber which has a unique elasticity. Due to its elastic property, it is used in making stretchable clothing. … Moreover, this fiber can stretch up to 500% of its length. The fiber is resistant to wear and tear caused by sweat, detergents, body oils, lotions, etc.