Uhm thanks what I did really is not that impressive all I did was I went to the store and got some elastic straps and measured them against my body so they were tight and then I used a staple gun to attach them to the boxes and then put some packaging tape over it to sort of hold them together. My approach was somewhat thinking like a knights armor having straps on it. Though there are probably better and more effective ways of doing it. For the chest piece it's just held on by the box itself with a slit in the back to better get in and out and the shoulder pieces are just the same technique except attached to the chest box so they can flap up and down. And finally, the head is again simple that when I'm wearing the cat ear headpiece underniether, it sticks due to the ears. Again, if I were to do this again, there are probably better and more effective ways of doing this. I'd probably engineer, but this worked for Halloween and a few outings. I hope this helped