The weight and thickness of knitted interlining play a crucial role in determining the performance, appearance, and comfort of garments. Choosing the right interlining for a garment is key to achieving the desired balance between structure, flexibility, and durability, as these factors directly impact the garment’s function and wearability.

### 1. **Impact on Garment Structure and Shape Retention**
Heavier and thicker knitted interlinings provide more support and structure to garments. They are commonly used in tailored clothing such as jackets, coats, and blazers, where a sharp, well-defined shape is essential. The increased thickness helps reinforce collars, lapels, cuffs, and front panels, ensuring that these areas maintain their form over time. This is particularly important in garments that are frequently worn or subjected to stress, as thicker interlining helps prevent sagging or deformation.

On the other hand, lightweight and thinner knitted interlinings are better suited for garments where a more natural, softer drape is desired. These interlinings are often used in blouses, dresses, or casual wear made from delicate fabrics like silk or chiffon. Their lighter weight ensures that the garment retains a fluid, flexible silhouette without becoming stiff or bulky. Thinner interlinings also allow the garment to move and flow with the body, contributing to a more comfortable and elegant fit.

### 2. **Effect on Comfort and Flexibility**
The weight and thickness of the knitted interlining also affect the comfort and flexibility of the garment. Heavier interlinings can sometimes reduce the garment's stretch and flexibility, especially if they are too rigid for the fabric. This can result in discomfort, particularly in areas that require movement, such as the shoulders or elbows. However, when appropriately matched to the outer fabric, even thicker knitted interlinings can provide structure without sacrificing comfort.

In contrast, lightweight and thin knitted interlinings offer more flexibility and are ideal for garments made from stretch fabrics or those designed for activewear. These interlinings maintain the garment’s elasticity and movement, making them suitable for sportswear or form-fitting garments where freedom of movement is critical.

### 3. **Influence on Breathability and Wearability**
Heavier knitted interlinings can sometimes reduce the breathability of a garment, particularly if multiple layers are involved. This may cause discomfort in warm weather or during extended wear. Lightweight interlinings, however, enhance breathability, ensuring better air circulation and temperature regulation, which is important in garments worn in different environments or for long periods.

### Conclusion
The weight and thickness of knitted interlining significantly impact garment performance, Interlining China influencing factors such as structure, flexibility, comfort, and breathability. Heavier interlinings provide more support and shape retention but may reduce flexibility and breathability, while lighter interlinings enhance comfort, movement, and airflow, making them ideal for softer, more fluid garments.