The only hockey mask used in The Final Chapter that we see make the final cur was the stunt mask used in Part 3. Throughout filming the mask gradually deteriorated, gaining a crack above the eye and losing two and a half chevrons. The part 3 hero was also briefly used or this film as well but we never see a clear shot of it during the film.
This mask will go on to be used for a few scenes in the next film, A New Beginning. After this it was then given to stunt coordinator Dick Warlock who sold it to a private collector a number of years ago.
The shirt worn by Jason in Friday the 13th Part 4 is a Vintage Sears Work and Leisure Perma Prest Shirt in Hunter/Olive Green.
While the brand of pants is unknown, we can see that they are a weathered grey khaki pant just like in Part 3.
The brand of boots worn by Jason in Part 4 are Heavily Worn/Weathered Kodiak Greb Boots.
For weapons, Jason uses a production made meat cleaver, 18" Collins 127 Machete, Vintage Aluminum Bone Saw, Collins Double Hit Axe, and a 440-10 Victorinox Forschner 10" Chef knife with a rosewood handle.