The "specifications" for vacuum compression bags generally refer to the combinations of sizes and functional parameters common in the market. Currently, these are largely based on industry conventions rather than mandatory unified standards, but they can generally be understood in terms of dimensions, capacity, thickness, and valve/interface design.
Regarding dimensions, vacuum bags are typically categorized by intended use into small, medium, large, and extra-large sizes. Small bags are often used for items like T-shirts and underwear; medium bags suit jackets and thin quilts; while large and extra-large bags are primarily for bulky items such as winter duvets or down comforters. Common sizes range roughly from 40×60 cm to 80×100 cm (or even larger), with slight variations between brands.
In terms of capacity, some products specify the volume they can hold (e.g., "fits one single-bed duvet" or "two winter jackets"). This approach focuses on usage scenarios rather than strict cubic measurements, making it easier for consumers to intuitively gauge suitability.
Thickness specifications are usually expressed in "si" (a common Chinese unit equivalent to 0.01 mm) or millimeters (e.g., 60-si or 80-si). Greater thickness generally offers superior puncture resistance, making the bags suitable for long-term storage or repeated use. Thinner products are lighter and more convenient, making them ideal for short-term or temporary storage.
Specifications regarding interfaces and structure primarily cover zipper types (single-track vs. double-track), air valve sizes (compatibility with standard vacuum cleaner nozzles), and the inclusion of sealing clips. While these details do not directly affect the bag's dimensions, they influence the user experience and sealing performance, representing "hidden specifications" that are important to consider when purchasing.