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A
.gov website belongs to an official
government organization in the United States.
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A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Illustration of testing shoes. (A) Structured Upper condition (SU). (B) Minimalist Upper condition (MU). (C) Low Resilience cushioning material condition (LR). (D) High Resilience cushioning material condition (HR).
