My 7ECA came with a Little Softie which I assumed was too small for me (it's pretty compact). But I read up on it and it was rated for 240 lbs so it would work. Par-phernalia is barely a legal cross country flight from home for me so on a day I couldn't find my way to work I flew up there to see if they would repack my chute.
Nice people. The woman checked my chute and found it was made in 1996, and told me they don't touch them if they're over 20 years old regardless of condition. They did offer me $500 trade in towards a new one of any type. Offered to let me try both backpack style and seat cushion type (the seats of the "champ" are made for either choice).
There are two things in play when to comes to old parachutes.
First, in the past age wasn't considered to be an issue. However over time some manufacturers (beginning in the 1980s and 1990s, around the same time they detected acid mesh issues reserve parachutes) decided that polyamide fabric (nylon) has a life span of 30-40 years and conservatively decided that it might not be strong enough after 20 years. Legally, parachutes are approved under a TSO and unless the original TSO stated a service life, there isn't anything the company can do to impose a service life after the fact. But many of the newer designs currently on the market do have a 20 year service life. There are variations on the theme.
Para-Phernalia is one of the companies that does state a service life on the TS0 so all Softie chutes turn into pumpkins after 20 years as they cannot be legally used (at least to meet for FAA parachute requirements).
MarS is a Czech company that makes emergency parachutes and they also have a specified 20 year service life.
Strong doesn't specify a service life for its parachutes and clearly states it is up to the rigger to determine continued airworthiness. That's a benefit for an owner who takes care of his/her parachute, keeps it clean, doesn't expose it to oil, and stores it in a climate controlled environment and out of sunlight. On the other hand it leaves all the liability for determining continued airworthiness for an old parachute on the rigger.
Butler splits the difference. They don't specify a service life on the TSO but they *recommend* a service life of 20 years since entering service or 25 years since manufacture. That's enough to make most riggers uncomfortable packing a chute that is outside those recommended age limits.
(Edited) I checked for information on National Parachutes and in a 2009 owners manual they state the following: "it is the opinion of the current management at National Parachute that the maximum service life is 20 years from date of manufacture." Since they cannot change the original TSO that's a recommendation like Butler's, but again it's enough to make any rigger uncomfortable repacking a chute older than 20 years.
National also cited the military standard for service of life of no more than 16.5 years since date of manufacture and no more than 12 years since the date it was placed in service. National also referenced discussions by the Parachute Industry Association (PIA) and remarked that PIA "has visited this issue without conclusion to date." (2009 in this case).
Second, with some manufacturers and industry experts *recommending* a 20 year service life, some riggers (all of them in my area) won't pack a chute or use a container and harness that is more than 20 years old, even when it does not have a service life limit in the TSO.