The primary objective of this trial is to demonstrate the ability of a full length foam insole to provide relief from pain due to osteoarthritis of the knee or general knee pain when used in foot wear for a 4-week period of time.

The secondary objectives comprise the evaluation of the insole's ability to provide appropriate shoe fit and comfort as well as relief from osteoarthritis/ general knee pain after short-term use. The safety and tolerability of the test articles in terms of adverse events (AE) will also be investigated.

Inclusion Criteria:

• Male subjects with age 18 to 70 years and a self-reported foot size between 8 and 14
• Subjects with regular knee pain
• Subjects with a baseline pain level of pain of ≥20 mm to ≤90 mm on 100 mm VAS scale at baseline (Visit 1)
• Subjects must be able to walk unaided by cane or walker.

Exclusion Criteria:

• Subjects with knee pain which is due to a recent injury