Product Specification Document

Custom Technical Workwear

Detailed specifications for custom-manufactured technical workwear. Reference product: Duluth Trading Company Flexpedition line. Upgraded with CORDURA Naturalle nylon 6,6 fabric for superior durability while maintaining the same cotton-soft comfort and feel.

Reference Brand Duluth Trading Co.
Product Line Flexpedition
Color Black
Custom Addition Faraday Signal-Blocking Pocket
Primary Product

Flexpedition Relaxed Fit Cargo Pants

CORDURA Naturalle nylon 6,6 cargo pants with 4-way stretch and ripstop weave. Feels like the Duluth Flexpedition — soft, flexible, cotton-like hand-feel — but built with 3x the abrasion resistance for multi-year daily wear. NanoSphere DWR treated. Designed for security professionals and everyday consumers alike.

Front view
Detail view 1
Detail view 2
Detail view 3

Additional Reference Photos

Flexpedition Cargo - additional detail Construction Detail
Flexpedition Lined Cargo - Black Lined Variant (Black)
Flexpedition Slim Fit Cargo - Black Slim Fit Variant (Black)

Technical Specifications

Material & Construction

Complete fabric and construction specifications for manufacturing reference.

Fabric93% CORDURA Naturalle Nylon 6,6 / 7% Elastane
Fabric Weight7.2 oz per square yard (245 gsm), 300 denier
Stretch4-Way Stretch
Water ResistanceSchoeller NanoSphere DWR — 50+ wash cycles, heat-reactivatable
InteriorPeached for next-to-skin comfort
AbrasionCORDURA rated — 3x standard nylon abrasion resistance (ASTM D3884)
WeaveRipstop — reinforcement grid prevents tear propagation
ColorBlack (BLK)
StitchingTriple-needle + bar-tack reinforcement at all stress points
ZippersYKK zippers throughout
CrotchGusseted crotch (Crouch Gusset)
FitRelaxed Fit
Waist Sizes30" – 48"
Inseam Options30", 32", 34", 36"
OriginImported (Vietnam)
Ref. Price$99.50 USD (retail)

Engineering

Key Features

CORDURA Naturalle Fabric

CORDURA Naturalle nylon 6,6 delivers the look and comfort of cotton with 3x the abrasion resistance of standard nylon. Full-dull luster yarn creates a matte, natural finish. 7% elastane provides 4-way stretch. Ripstop weave stops tears from spreading. The fabric feels identical to premium cotton but lasts years longer.

NanoSphere Water Repellent

Schoeller NanoSphere DWR finish lasts 50+ wash cycles — over 2x longer than standard DWR. Retains function after 30,000 abrasion cycles where standard DWR fails at 5,000. Reactivate by tumble drying on medium heat or ironing. PFOA/PFOS-free.

Gusseted Crotch

Diamond-shaped fabric panel in the crotch area distributes stress across a wider seam area. Eliminates restriction during climbing, crouching, and high-step movements.

Triple-Needle + Bar-Tack

Three parallel rows of stitching on every stress point, plus dense bar-tack reinforcement at all pocket corners, belt loop junctions, and fly attachment points. Bar-tacks prevent the #1 failure point in work pants: pocket corner tear-out.

YKK Zippers

All zippers sourced from YKK, the world's leading zipper manufacturer. Known for reliability, smooth operation, and resistance to corrosion and repeated use cycles.

Peached Interior

Interior fabric surface is brushed (peached) for a soft, smooth hand-feel against skin. Provides comfort across temperature ranges without adding bulk or trapping heat.

Faraday Signal Blocking

Integrated copper/nickel Faraday fabric pocket blocks all wireless signals including cellular, WiFi, Bluetooth, and GPS. MIL-STD-188-125-2 compliant with 100 dB+ signal attenuation up to 40 GHz.

Reinforced Knee Panels

Double-layer abrasion-resistant knee panels with internal knee pad pocket. Pre-shaped to follow natural leg bend. Built for personnel who kneel frequently during patrols and inspections.

Radio-Ready Design

Reinforced D-ring and radio clip loop at belt line for two-way radio mounting. Covert back pocket and ID window pocket for security credentials. Purpose-built for uniformed professionals.

Configuration

Pocket Layout

8-pocket security configuration with Faraday-lined cargo pocket and covert credential storage.

  • Front Hand Pockets2x — Standard slash pockets
  • Back Patch Pockets2x — Reinforced patch style
  • Cargo Pockets2x — Zippered, one with Faraday liner
  • Covert Back Pocket1x — Hidden zip, small of back
  • Pen / Flashlight Pocket1x — Vertical, thigh-mounted
Total Pockets8
Cargo ClosureYKK zipper
Faraday PocketLeft or right cargo (removable liner)
Covert PocketSmall of back, for credentials / ID
Radio MountReinforced D-ring at belt line
ID WindowClear-window internal cargo pocket for credentials
Hidden DetailReflective trim on interior outseam (visible when cuff rolled)

Custom Enhancement

Faraday Signal-Blocking Pocket

Integrated Faraday cage pocket that blocks all wireless signals — cellular, WiFi, Bluetooth, GPS, NFC, and RFID. When a phone is placed inside, it receives zero incoming calls, messages, or notifications until removed.

Shielding Material

Copper/nickel woven Faraday fabric (TitanRF-grade or equivalent). Conductive mesh blocks electromagnetic fields from low MHz through 40 GHz, covering all consumer and commercial wireless bands.

Signals Blocked

Cellular (2G/3G/4G/5G), WiFi (2.4 & 5 GHz), Bluetooth, GPS/GLONASS, NFC, RFID (125 kHz – 13.56 MHz), satellite, key fob signals, and EMF radiation. 100 dB+ signal attenuation.

Military Standard

Shielding material must be MIL-STD-188-125-2 compliant and exceed IEEE 299-2006 standards (1 – 40 GHz). This is the same certification used by military and law enforcement forensics investigators.

Pocket Design

Removable Faraday liner that can be positioned in the left or right cargo pocket. Liner fully encloses the device when pocket is zipped. Phone is completely dark — no signal in or out — until removed.

Sourcing

Faraday fabric can be supplied by manufacturer or sourced separately (e.g., TitanRF from MOS Equipment, or Multishield fabric). Confirmation needed on supplier capability during sample phase.

Wash Durability

Faraday shielding effectiveness must be maintained through repeated wash cycles. If removable liner design is used, liner can be removed before washing to preserve shielding indefinitely.

Faraday Reference Product (SLNT, $799.95)

SLNT Faraday Pants - full product SLNT Faraday Pants
SLNT removable Faraday pocket Removable Faraday Pocket
SLNT Faraday pocket detail Faraday Pocket Detail

Manufacturing Notes

Construction Requirements

01

Seam Construction

Triple-needle stitching on all stress points including inseam, outseam, crotch, waistband, and pocket attachment points. Flat-felled seams preferred for durability and comfort against skin.

02

Gusset Design

Diamond or triangular gusset panel in the crotch area. Must use the same 89/11 nylon/spandex blend as the main body. Gusset eliminates the four-corner stress junction that causes blowouts.

03

Waistband

Reinforced waistband with interior grip strip to prevent shirt pull-out. Wide belt loops to accommodate duty belts. Button and zipper fly closure with YKK hardware.

04

DWR Application

Factory-applied DWR coating on finished garment. Water should bead and roll off fabric surface. Treatment must withstand minimum 20 wash cycles before reapplication is needed.

05

Reinforced Knee Panels

Double-layer abrasion-resistant knee area with internal pocket for removable knee pad inserts. Pre-shaped panels follow natural leg bend, eliminating bunching behind the knee during crouching.

06

Reflective Trim

Hidden reflective tape on interior outseam, visible only when cuff is rolled up. Provides optional visibility in low-light conditions without compromising the clean exterior appearance.

Real-World Reference

Additional Product Photos

Photographs of actual Flexpedition pants for construction and detail reference.

Flexpedition Cargo Pants - frontActual Product — Front
Flexpedition Cargo Pants - detailActual Product — Detail
Flexpedition Cargo Pants - labelActual Product — Label
Flexpedition Cargo Pants - cargo pocketCargo Pocket Detail
Flexpedition Cargo Pants - interiorInterior Construction
Flexpedition Cargo Pants - waistbandWaistband Detail

Expanding Collection

Additional Products

Future product lines under development. Specifications will be added as designs are finalized.

Technical Work Shirt

Moisture-wicking, stretch-fabric work shirt with reinforced elbows and chest pockets. Matching construction standards.

Specifications Pending

Insulated Cargo Pants

Microfleece-lined variant of the Flexpedition cargo pant for cold weather operations. Same exterior construction with bonded interior.

Specifications Pending

Lightweight Shorts

Above-knee cargo shorts using the same 89/11 nylon/spandex blend. Zippered cargo pockets and gusseted crotch maintained.

Specifications Pending

Manufacturing Inquiry

Order Details

Phase 1Sample production (1 unit for approval)
Phase 2Small batch: 50–100 units
Phase 3Production run: 500+ units
ReferencePhysical pair of Duluth pants available to ship for reverse engineering
NeededSample cost and timeline
NeededPer-unit pricing at 50–100 pcs and 500+ pcs
NeededFaraday shielding fabric sourcing confirmation
CustomAll original features + Faraday pocket + security-specific additions