But they are as intricately built as a lot of shoes, with varying-density memory foam and a carbon-fiber heel cup.
但是，它们和很多鞋子一样造型复杂，有着不同密度的记忆泡棉和碳纤维后跟。
Contoured heel cup for added comfort.
异形后跟杯，增加舒适度。
Molded plastic heel cup helps stabilize the foot and prevent injuries.
注塑后跟杯，帮助稳定足部，防止受伤。
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