The present invention relates to an absorbent article, comprising a fluid permeable topsheet, a backsheet, an absorbent element disposed between the topsheet and the backsheet wherein the absorbent article has a caliper expansion measured at 5 minutes of at least 275%. The present invention also relates to an absorbent article, comprising a fluid permeable topsheet, a backsheet, an absorbent element disposed between the topsheet and the backsheet wherein the absorbent article has a dry caliper of 4.5 mm or less and wherein the absorbent article has a caliper expansion, measured at five minutes of at least 75%. The present invention also relates to an absorbent article, comprising a fluid permeable topsheet, a backsheet, an absorbent element disposed between the topsheet and the backsheet wherein a ratio of the caliper expansion measured at 5 minutes to the dry peak stiffness is at least 0.5%/N.

The present invention relates to an absorbent article, comprising a fluid permeable topsheet, a backsheet, an absorbent element disposed between the topsheet and the backsheet wherein the absorbent article has a caliper expansion measured at 5 minutes of at least 275%. The present invention also relates to an absorbent article, comprising a fluid permeable topsheet, a backsheet, an absorbent element disposed between the topsheet and the backsheet wherein the absorbent article has a dry caliper of 4.5 mm or less and wherein the absorbent article has a caliper expansion, measured at five minutes of at least 75%. The present invention also relates to an absorbent article, comprising a fluid permeable topsheet, a backsheet, an absorbent element disposed between the topsheet and the backsheet wherein a ratio of the caliper expansion measured at 5 minutes to the dry peak stiffness is at least 0.5%/N.

Water-absorbing resin particles, in which a light transmittance at a wavelength of 425 nm when the water-absorbing resin particles are swollen 30 times with a physiological saline solution is 20% or more, are disclosed.