Diaper and absorbent article

A system comprising:

• a) a diaper for holding an absorbent article in close bodily contact in a crotch region of a wearer, said diaper having a longitudinal centerline defining a longitudinal direction and a lateral centerline defining a lateral direction, said diaper comprising:
• 1) a front region;
• 2) a crotch region attached to the front region, said crotch region comprising elastic knit material suitable for use in a diaper, said crotch region having high stretch in both the lateral and longitudinal directions as measured by having a Crotch Holding Force (CHF-4.0) of greater than about 0.1 kgf and a Crotch Holding Force (CHF-5.5) of less than about 1.0 kgf;
• and
• 3) a rear region attached to the crotch region, said rear region comprising at least two fastening systems that cooperate with the front region to provide an adjustable waistband;
• and
• b) an absorbent article capable of being held in close bodily contact in the crotch region by said diaper, said absorbent article comprising a liquid pervious side, a liquid impervious side opposite the liquid pervious side, and an absorbent component between the liquid pervious side and the liquid impervious side, wherein the liquid pervious side and the liquid impervious side are arranged to form a unitary structure.