[UNPUBLISHED]

Danny Foster appeals the district court’s 1 order affirming the denial of disability insurance benefits (DIB) and supplemental security income. Upon de novo review, see Buckner v. Astrue, 646 F.3d 549, 556 (8th Cir. 2011), we affirm. First, we find no error in the administrative law judge’s (ALJ’s) determination as to which of Foster’s impairments was severe. See Caviness v. Massanari, 250 F.3d 603, 605 (8th Cir. 2001) (claimant has burden of showing impairment is severe-that it significantly limits his physical or mental ability to perform basis work activity). Second, we find that substantial evidence supports the ALJ’s determination as to Foster’s residual functional capacity (RFC), see Jones v. Astrue, 619 F.3d 963, 971 (8th Cir. 2010) (ALJ is responsible for determining RFC based on all relevant evidence, including medical records observations of treating physicians and others, and claimant’s description of limitations) 2 ; *517 and that the ALJ properly relied on the testimony of a vocational expert to find that Foster could perform his past relevant work, see Wagner v. Astrue, 499 F.3d 842, 853-54 (8th Cir. 2007). Finally, to the extent Foster has properly developed the issue, see Meyers v. Starke, 420 F.3d 738, 743 (8th Cir. 2005), we reject as meritless his contention that he was presumptively disabled under a particular listing.

The judgment is affirmed.