Water absorbent resin particles

Water-absorbent resin particles comprising:

• a crosslinked polymer having a monomer unit derived from an ethylenically unsaturated monomer including at least one compound selected from the group consisting of (meth)acrylic acid and a salt thereof,
• wherein a proportion of (meth)acrylic acid and a salt thereof is 70 to 100 mol % with respect to a total amount of monomer units in the crosslinked polymer, and
• an artificial urine permeation speed when the water-absorbent resin particles are swollen tenfold is 1.0 g/min or more and 35.0 g/min or less, a water retention capacity for a physiological saline solution is 32 to 60 g/g, and a contact angle measured in a test performed in the order of i) and ii) below is 44 degrees or larger and 70 degrees or smaller,
• i) a spherical liquid droplet, which corresponds to a diameter of 3.0±0.1 mm, of a 25% by mass saline solution is added dropwise at 25° C. onto a surface of a layer formed from the water-absorbent resin particles to bring the water-absorbent resin particles into contact with the liquid droplet, and
• ii) a contact angle of the liquid droplet is measured at a timing which is 30 seconds after the liquid droplet is brought into contact with the surface.