Hi,
Yes, you would need a spec pack with all the descriptions / details / sizing etc to have this manufactured. First you could have 1 pack just to get the shape, fit and detailing right, once this is correct you can add the prints / different details / colours etc.
I've got years of experience designing tech packs, for mens, womens and kidswear.
Please have a look at my profile and portfolio.
For $250 I could make you the finished spec pack including advice on how to go about this.
Please get in touch for more info,
Many thanks,
Kind regards,
Carla