These are 37 Pattern, British style pack straps, as issued to the Belgian Air Force. They are made of heavy-duty cotton canvas with brass hardware. Visible dates are from the early 1950's but not all are marked. These come in a gray/blue color. Sold in pairs (left and right).
The P37 web equipment was used by Great Britain, Commonwealth countries, and several other countries they influenced following WWII.
The condition ranges from good to excellent with storage wear. An attempt is made to match the color and wear, but it may not be exact.