At 195 lbs, the boy is too heavy for an E-Z-ON adjustable vest, even though his waist and chest measurements seem to be within the limits of the large size that mom says he is using. Maximum weight of the vest is 168 lbs. E-Z-ON will customize a vest for larger/heavier people but that requires a special request and a signed waiver of liability. I doubt that has been done here. Most distributors don't make an issue of the weight limits; they just want to sell the product with minimum effort.
What is his age and medical condition? Is he transported to a school? (At 6'5" I suspect he is not in a school situation, but the question remains.) Are these escape problems evidenced when he is riding in a passenger car...a van...or a school bus? Is he secured with a seat belt and top tether....or with a floor mount system....or perhaps even with a "portable school bus seat mount"? I wonder if he has this escape problem in every vehicle situation or just in one specific type.
Does the vehicle(s) in which the boy is transported have LATCH anchor points at the seat bite? I ask this because E-Z-ON will have available within a couple of weeks a new LATCH connector kit for use in vehicles with LATCH anchor points on the vehicle seats (two straps with anchor clips on each end); these take the place of the vehicle seat belt.
If this boy can turn around and "unhook himself from the mount", that suggests the "seat mount" straps are not pulled as snug as they can and should be. With a tight adjustment, there would be no slack to allow him to unhook the attachment.
Most of her comments are spent on the upper arm restraints and her confusion over correct use and the lack of instructions. Surprisingly to all of us, E-Z-ON does NOT have an instruction sheet for the upper arm restraints. They've just never gotten around to it. I've been complaining to them about this oversight for years. As for correct use, the mom is right when she figures the connecting strap goes under the front shoulder straps. It is too short to pass around the back of the passenger. (I am hoping E-Z-ON will product at least a one page sheet for the upper arm restraints this year.)
In the photos I notice that the wrist restraints are of the "new" style which do not have the lambs wool padding which used to be standard a few years back. I will not sell the new style; they are much too rough and uncomfortable. I supply only the old style with the padding; it's more comfortable, offers a more snug fit, and encourages greater acceptance of the securement. They make it especially for my company at a little more cost; I sell a set of padded wrist cuffs for $40.00.
The mom thinks there should be something on the US market like the positioning system offered in England. There is not at this time, and I think the regulatory and liability framework here works against that happening. She always could try to order it direct, but I don't think the company would ship to the US and, if she got one and used it, she might get a ticket for it.
Give me a call if you'd like to talk about these issues in more depth....and fell free to pass along my number to the mom in case she wants to talk more.