Foam used to reduce camber (draft) of roller furling sail when partialy furled. When sewn on luff in a crescent moon shape there will be more cloth rolled out of the middle than the ends to help flatten the reefed sail.
- Foam padding flattens sail when furled
- Flatter sail reduces heeling and makes boat easier to steer
- Easy to cut
- Does not absorb water
- Available only on full rolls