Welcome to Brainstorm Equipment!

Hello! I’m Ruslan, aka Brainstorm, and I’ve hiked 10,000 miles in the last ten years. An advocate of lightweight backpacking, I learned what features I wanted in a pack, but no pack delivered them all: so I began sewing my own! When not in the wilderness I live in Brooklyn, and I needed a pack for everyday use; starting with the simple, lightweight, long-distance backpacking design, I developed the FUNCTION pack. Compact yet voluminous, it includes a zippered exterior pocket, two exterior stretch pockets, shoulder strap pockets, and finally, an interior laptop sleeve. Carefully designed and handmade by me with high-quality materials, the FUNCTION Pack performs beautifully in both the metropolitan and wilderness landscapes. Since opening my shop, I've developed the LITE Pouch and TECH Tote, made with the same attention to design, craft and functionality, to assist with your everyday organizational needs. Thanks for stopping by!


Inspired by long-distance, lightweight backpacking designs, the FUNCTION Pack adds—and removes—features to create a versatile tool for any environment.


Capacity: 25 Liter

Weight: 15 - 22 ounces

Highly Water Resistant

Versatile Roll-Top Closure

Secure Front Pocket

Interior Laptop Compartment

Shoulder Strap Pockets

Multi-Adjustable Sternum Strap

Stretch Side Pockets

Visit Brainstorm Equipment

Stop by the shop!

Located in the Market Line, below Essex Market, on the southeast corner of Essex St. and Delancey St.

Shoot me a message if you plan on stopping by!


See a pack you like, but want to make a small change? Or do you want to pick out the panels, straps, tabs and lining colors from scratch?

Any way you like it, we can make your perfect CUSTOM FUNCTION pack!

Please contact me to start a conversation!

Comments, concerns, questions, suggestions?