“Class 100” and “Class 1000” come from the older US cleanroom standard, FED-STD-209E. The number is the maximum count of particles 0.5 µm and larger allowed in one cubic foot of air. The lower the number, the cleaner the room.

How the classes map to ISO

Most cleanrooms today are classified under ISO 14644-1. The two systems line up like this:

• Class 100 is equivalent to ISO Class 5
• Class 1000 is equivalent to ISO Class 6

What it means for the glove

A glove described as Class 100 or Class 1000 is one that is clean enough to be used in that grade of room. The practical difference is how many particles the glove itself carries.

• BestSky Class 100 glove – particle count below 1,200 per cm², made and packed in a Class 100 or cleaner environment
• BestSky Class 1000 glove – particle count below 3,000 per cm²

Which one do you need?

Use the glove grade that matches your room. A Class 100 glove can be used in a Class 1000 room, but a Class 1000 glove should not be taken into a Class 100 room. If your site has both, some buyers standardise on Class 100 to keep a single stock item.

Apart from cleanliness, the two gloves are the same: 12 inch powder-free nitrile with a beaded cuff, in 4.0 mil and sizes S, M and L.

Not sure which glove fits your process? Tell us your cleanroom class and we will recommend one, or see the full specification on the Products page.