The UK of course has the ADUX D1 expendable (think of a parachute made from woven plastic sacking and bailer twine) which I remember the AD guys complaining about failing and resulting in them filling in MALDROP reports. The MOD Project team were also upset as these parachutes were failing to complete 10 drops. The Boscombe guys looked into it, thought about it, and said "What do you expect, they were only designed for one drop, two at the most, the clue is in the name expendable. Stop extracting the urine."