http://www.ritehite.com/products/seals-and-shelters/seals/tp-platinum/

Foam dock seals create a great environmental seal, but because they are compressed by the force of the backing trailer, their components are subject to extreme pressure, particularly at the top and corners.
High Performance dock seals from Frommelt employ new technology, and hold up when other dock seals fail.

Frommelt dock seals with High Performance head curtains are designed to create and keep a better seal on the trailer.
The High Performance head curtain also features wear components protected by friction-resistant Durathon fabric and attached with Velcro for easy and economical replacement when needed.
All High Performance headers are protected with Firefighter heat dissipation technology inside. This prevents dock seal burning from compressed trailer marker lights.
For more information about Frommelt dock seals go to
http://www.ritehite.com/products/seals-and-shelters/seals