Product systems Case study

COG Low-Profile EDC Sling

A slim sling bag I designed for my own work travel, refined over a year of prototypes on my own sewing machines, then turned into a spec pack for production. PTS sells it as the Covert Operations Gear (COG) Low-Profile EDC Bag.

The Multicam sling bag lying open, with a notebook, pens and small tools organized in its interior pockets

At a glance

Problem
I wanted an organized, low-profile way to carry an iPad mini and daily essentials on work trips, and there weren't many good options.
My role
Designed the bag from scratch, sewed the prototypes, added a modular panel system, and wrote the spec pack for the manufacturer.
Result
PTS produced it through Grey Ghost Gear, and it's sold as the COG Low-Profile EDC Bag in Multicam and Covert Grey.
Client
PTS
Role
Designer: concept, sketching, patterning, sewn prototypes, and the production spec pack
Timeframe
2013–2014
Team
Designed and prototyped solo; Alex and another collaborator suggested changes; Grey Ghost Gear manufactured it
Disciplines
Consumer Goods · Cut-n-Sew
Outcome
In production and sold by PTS as the COG Low-Profile EDC Bag
Client
PTS
Role
Designer: concept, sketching, patterning, sewn prototypes, and the production spec pack
Timeframe
2013–2014
More details
Team
Designed and prototyped solo; Alex and another collaborator suggested changes; Grey Ghost Gear manufactured it
Disciplines
Consumer Goods · Cut-n-Sew
Outcome
In production and sold by PTS as the COG Low-Profile EDC Bag

Context

When I traveled for work, I wanted a way to keep my things organized. At the time, there weren’t many good options for carrying my daily essentials. So I started with a list of what I carried on work trips, and designed a bag around it.

Problem

The bag had to carry an iPad mini and a few small items close to the body, organized. I wrote three requirements to guide the design.

  1. My own carry problem No good low-profile option for an iPad mini and daily essentials.
  2. A first prototype At a trade show, several people stopped me to ask where I bought it.
  3. A year of refinement New materials, stitching, patterns, and laminations.
  4. A product Associates at PTS asked me to design the bag with them for production.

Constraints

  • Water resistant.
  • Organized, with a place for each item.
  • Wear resistant.
  • Low profile, sized around an iPad mini.

What I did

I designed the bag from scratch. I sketched the overall form, then worked out the details: the strap, the pocket layout, and how the fabric, hook and loop layers stack in each seam.

Three sketches: the bag from the front with two lower pockets and its strap, a detail of the strap with a layered seam callout for fabric and hook-and-loop, and a colored study of the strap and pocket layout
Early sketches (the first dated July 2013): the overall form, a seam stack-up, and a strap and pocket study.

Then I prototyped it, again and again. I made my first prototype to take to a trade show. Walking the show floor, I was stopped by several people asking where I’d bought my bag. That interest pushed me to refine it. For the next year, I experimented with new materials, sewing techniques, and patterns, including heat-sealable fabrics and simple laminations.

Olive and black fabric pattern pieces laid out on a cutting mat
Cut pattern pieces for one prototype, laid out before sewing.
An early olive prototype with gray flaps, zippered pockets and a metal clip
An early sewn prototype.

I prototyped on my wife’s hobby sewing machine until the heavy materials nearly destroyed it. Then I bought an industrial machine, which let me make production-quality bags that could be tested. By the time the trade show came around again, the design was solid. A couple of associates from PTS approached me and asked if I’d design a bag with them.

Then I made it modular. The team wanted to add a pistol holster. The sling was never designed to carry a weapon, so instead of reworking the whole bag, I made the panels swappable. Alex and another collaborator suggested changes along the way.

The bag body and three separate Multicam panels and a strap section laid out on a white surface
The modular system: the bag body with its swappable panels removed.

Then I wrote the spec pack. With guidance from friends in the outdoor industry, I documented every panel, pocket, strap and stitch callout for the contract manufacturer, Grey Ghost Gear.

Spec pack page: a line drawing of the bag with its strap extended, numbered callouts, and a sidebar with a color key and notes
The overview page of the eight-page spec pack (July 2014).

Outcome

The bag went into production through Grey Ghost Gear. PTS sells it as the Covert Operations Gear (COG) Low-Profile EDC Bag, in Multicam and Covert Grey.

The Multicam bag with a phone tucked into a stretch pocket on its shoulder strap
A finished bag, with a phone pocket on the strap.

1 year

of prototyping, from a bag for myself to a production-ready design I sewed the prototypes myself, first on a hobby machine and then on an industrial one.

Review

The project was deceptively complicated and taught me a lot. Sewing quality goods takes deep knowledge of textiles. It started with my wanting what was essentially a purse for work trips, and it ended with a product on the market.

  • The sling bag in Covert Grey, on a gray background with its shoulder strap looped

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