I don't know if it would be okay for partial, but for full suspension I definitely would advise against using a waist tie from a robe. This is what I used the first time I did FSH and it was far more comfortable than proper rope, but it broke after a few seconds of suspension.
thank you for letting me know, it feels pretty strong, i tested it by tying it on my doorknob and pulling down, it seems touch but the stitching is coming undone, so i may restitch it and as i do that i can probably reinforce it if necessary, maybe adding some sorta liner inside to make the fabric stronger, and make sure my stitches are well done on it (i like sewing a lot so im confident in figuring out how to fix it in general if not make it stronger) so i dont risk it breaking.
i practiced the knots i need to use for both ends, and they seemed to work well with the robe just as is. im unsure if it would be good for FSH, got curious while writing and i just tested it again on one of the hanger things built into my closet wall deep into hardwood (old house, more sturdy materials in some places here), tied a snuggle hitch to it and wrapped it around my arms, trying to put my full body weight into it, as well as some muscle to test if that hook was usable. the metal of the hook bent slightly, but stayed in the wall and didnt snap nor did the robe tie, i tested each hook with my hands first and that was one of the strongest ones. im thinking whatever fabric my robe is made out of is strong too, its polyester i think probably but also thick and its two pieces of that strong fabric sewn together. if i get a strong thread to fix the seams that are already half undone, that hopefully matches the color to look normal, and see what i can put inside it for extra security, sounds like the most comfy option imo
idk if i would FSH with my disability, i already have neck instability and if that fails and i just break my neck more, i would pray i am not paralyzed so then i can just get hit by a train or some shit fr. the amount of hypermobility and cervical instability i have, my neck is curved the opposite way already with a bulging disc in C3-4 and endplate remodeling, and a posterior disc protrusion in C5-6 pushing on my spinal cord, and because my neck bends so much it presses into it even harder so easily just by looking up will give me bad pain and even some neuro symptoms. if i fucked up somehow and just caused more damage without dying, before lacking enough air that my brain is dead enough to not feel it anymore even if they "recover" me, i would hate myself even more for it by making what is part of me choosing my end even worse without escape
partial seems better for me that way, even if it takes more mental willpower, but i have ways around it if needed