The Ghostbusters reboot starring four ladies in the lead roles is currently filming, so naturally the original film has been on everyone’s minds.

Many people are especially thinking about Ghostbusters this week because San Diego Comic-Con is on the horizon. Many geeks will be hitting the beautiful California city and dressing up in their finest cosplay. With the concept of ghost-busting back in mainstream pop culture, dressing up like a Ghostbuster sounds like the perfect idea for any fandom convention you’re attending.

So how can someone create their own Proton Pack for their Ghostbusters-themed cosplay? Thanks to Feig, the director of the Melissa McCarthy-led reboot, you can now learn exactly how to do so!

Feig posted the following graphic on Twitter which carefully outlines every single aspect of the Proton pack. Spectral RF Feedback Parameter Display? Check! Cryocooler Pule Tube? Check! Plasma Beam Tuning Cavity? Check! All parts of the Proton Pack have been carefully labeled — the photo is nerd-tastic.

In case that weren’t helpful enough, Feig also shared some dimensions for the gun when a fan made the request:

A smart cosplayer will hide some storage drawers within their Proton Pack. You’ll need a place to hold soda and back up battery power for your phone.

Now you too can own the perfect Proton Pack. Thanks Feig!

The Ghostbusters revival stars Melissa McCarthy, Kristen Wiig, Kate McKinnon, and Leslie Jones in the leading ghost-busting roles. In a turn-of-the-tables casting, Chris Hemsworth will play their secretary, Kevin. The movie opens in theaters next year.

Feig has been very active on Twitter as filming on Ghostbusters has continued. Most recently he revealed the costumes the women will be wearing (they’ll be dressed just like the men — no objectifying in this film!) and also shared the new Proton Pack (same link).