Yes, sticky back Velcro can stick to fabric. Sticky back Velcro consists of two components: the hook side (which is rough and has tiny hooks) and the loop side (which is soft and has tiny loops). The adhesive backing on the sticky back Velcro is designed to adhere to various surfaces, including fabric.
When applying sticky back Velcro to fabric, it's important to ensure that the fabric is clean and free from any dust or debris. This will help promote better adhesion. It's also a good idea to press the Velcro firmly onto the fabric to ensure a strong bond.
Keep in mind that the effectiveness of the adhesion may vary depending on the type and texture of the fabric. Some fabrics, such as those with loose weaves or delicate materials, may have a less secure bond compared to sturdier fabrics. It's always a good idea to test the adhesion in a small, inconspicuous area before applying sticky back Velcro to a larger surface or using it for any critical applications.