Hydrostatic Head | Definition

Pronunciation:

hī-dro-sta-tik  hed

Definition:

HH is a rating of how waterproof a fabric is. (Ranging between roughly 300mm -  10,000mm.) The rating refers to the pressure of water in millimeters i.e. a HH rating of 10,000mm means a column of water could be 10 meters tall before the fabric would start to show water seeping through.

Glossary Category:

Testing