"Fluid capacity" of ALL products uses a test method that simulates wearing conditions of the end-user. The test exerts pressure on the product after saturation. The amount of saline solution (synthetic urine) that is retained after pressure is applied is the value that is displayed as actual fluid capacity for each absorbent product and every size.
Absorbent products absorb more fluid under "free-swell" conditions than they retain under pressure. People using incontinence products are sitting, standing, walking, and lying down - all of which exert pressure on the product.
Concerned caregivers and end-users are acutely aware that retention is a key factor in incontinence management.