From Superfeet:

One of the most versatile Superfeet insoles, Superfeet BLACK shoe inserts feature an easy-going, low profile design to improve the fit, comfort and performance of the widest range of footwear.

• HIGH DENSITY FULL LENGTH FOAM
  Closed-cell foam supports and cushions the foot for long-lasting comfort
• DURABLE CONSTRUCTION
  Superfeet insoles keep their shape, delivering reliable support and comfort for up to 12 months or 500 miles, whichever comes first
• HEEL CUP
  Accommodating heel cup to help stabilize and support the foot
• SUPERFEET® SHAPE
  The signature Superfeet shape helps stabilize and support the foot, which can help reduce stress on feet, ankles and knees
• ORGANIC, ODOR-CONTROL COATING
  All natural coating that eliminates odor-causing bacteria
• REINFORCED STABILIZER CAP
  The base of the insole that supports the rear foot and provides structure and stability to the foam layer