The Activate U-Throat features:

• Our lightest, most breathable construction yet.
• High-rebound ventilated EVA sole maximizes the flexible comfort.
• J&M Smart Degree Technology™ temperature-regulating polymers that line the interior activate at both hot and cold temperatures, so your feet feel just-right all day long.
• Removable, dual-density cushioned footbed.
• Rubber heel for durability and improved traction