Ventra

I learned straw plaiting by making a traditional boater hat, then used the same craft to build Ventra — a wearable cooling device of straw and salvaged electronics, with a digital product passport that traces every unit.

Project Type

University Project — Central Saint Martins, UAL

Cooling reimagined, made anywhere — Ventra worn on the back

— Project Info

RoleProduct Designer
Duration2 Months
ToolsProcreate, Photoshop, Figma, FigJam, Sketchbook, Workshop Machinery, Hand Tools
SkillsMaterial Research · Millinery · Model Making · Electronics Prototyping · Product Design · UX/UI Design · Wireframing & Prototyping · Design Systems · Circular Systems · Branding

Challenge

Learn a pre-industrial craft from my own heritage by producing a traditional piece from scratch, then carry that craft into something entirely modern, redesigning an everyday electronic product around it.

Solution

Inspired by a family photograph of my great great grandfather in a boater hat, I researched the history of straw plaiting and worked through material trials to make the hat from scratch. A hat cools by shade, a fan cools by air — so that same plait became the structure of Ventra, a wearable cooling fan housing salvaged electronics in a plaited straw shell. The design is open, so anyone can build one anywhere in the world from whatever grows nearby.

Ventra Product & Systems Pitch

Digital Product Passport

Made to track my product from sourcing to disposal — a record the EU is making mandatory.

Go to DPP UX section
The Ventra digital product passport, shown across five screens

Exploring British straw
plaiting traditions
Heritage &
Material Research
1
2
Traditional
Skills
Hands
in the straw
Cooling by
another means
The Modern
Take
3
4
Ideation
100 ideas,
one direction
From idea
to object
Development
5
6
Realisation
Making
Ventra
A product anyone
can make, anywhere
Global
Systems
7
8
Digital Product
Passport
Every product
tells its story

01 — Heritage & Material Research

Finding the craft in the family album

The brief: become an expert in a pre-industrial craft from your own cultural heritage.

I began by researching pre-industrial crafts: tweed weaving, watchmaking and leather work. None felt personally meaningful. The turning point came from a family photo album — a photograph of my great great grandfather wearing a boater hat, one I remembered wearing myself as a child. Shown with a British culture mood board. Secondary research — a craft centuries in the making. Straw plaiting has been practised in England since the 1400s. By the late 1600s over 100,000 people depended on it for income, and Luton grew into the centre of Britain's hat-making industry. Plaiters never worked from a set material, so I sourced cereal crops, bark, grasses, palm and raffia, and tried each one in a plait. Material and sourcing. I trial plaited each of my local materials, judging flexibility, texture and how well it held a fold. Wheat straw proved the most workable. To source the real thing I visited Lodge Farm, a National Trust heritage farm in Surrey, where the farmer grows heritage wheat varieties and gifted me a supply of straw. Understanding historical colour. To experiment with colour I sourced natural dyes and ran dye baths on the heritage wheat straw using beetroot, mint, turmeric, tea and carrot.

02 — Traditional Skills

Hands in the straw

With the material settled, I moved on to technique. I worked in paper straws to prototype a range of traditional British plaits quickly, testing each for structure and appearance. The rustic 4 plait proved best suited to a boater, and from there I researched the full making process.

Making Process

01 Get supplies
  • ·Dried cereal grain
  • ·Scissors
  • ·Cloth
  • ·Rolling pin
  • ·Warm water
  • ·Measuring tape
›
02 Prepare the straw
  • 1.Sort by length
  • 2.Roll flat
  • 3.Trim damaged ends
  • 4.Soak 5 minutes
  • 5.Roll and pat dry
  • 6.Divide into 4 bundles
›
03 Begin plaiting
  • 1.Label 1–2–3–4
  • 2.Strand 4 over 3
  • 3.Strand 1 over 2
  • 4.Cross the centre
  • 5.Pull to tighten
›
04 Add extra straw
  • 1.Insert into thinning bundle
  • 2.Overlap at the cross
  • 3.Continue plaiting
›
05 Finish
  • 1.Check length
  • 2.Roll flat
  • 3.Trim excess

Wooden Hat Block

I measured my head, drew the pattern, then shaped the plywood block.

Making the Hat

I followed the process I had researched: making the plait, winding it from the crown and blocking it under steam.

The Finished Hat

The finished boater, made from heritage wheat straw using centuries-old plaiting techniques.

03 — The Modern Take

Cooling by another means

The brief, part two: Reimagine an everyday electrical product using the craft we had each chosen. Only two rules: it had to perform the same function, and be made from nothing but that craft and salvaged materials. The options were a rice cooker, kettle, hairdryer, torch or fan.

Chosen product: the fan. The fan related most to the hat, so I could redesign how someone is cooled — a hat cools by shade, a fan cools by air. A moodboard of small portable and wearable fans on the market, a circuit diagram mapping how a fan works (USB-C, battery charging IC, MCU, button, fan motor, LED indicator and resistor), and a disassembly photograph labelling the case, fan, motor, wire, micro control unit, button, screws and battery.

04 — Ideation

100 ideas, one direction

I blurted down 100 designs, mainly inspired by biomimicry and my moodboard, exploring a wide range of possibilities across:

  • Ergonomics
  • Interaction
  • Visual language
  • Function

All based on cooling, using the plaiting techniques I had learnt and the components of the fan.

Initial Sketches

Developed Sketches

05 — Development

Development and user testing

I developed the chosen design against a hierarchy of needs, then user tested each round before resolving the final form.

Hierarchy of Needs: Before drawing anything further I set out what the product actually had to achieve, and made a list to judge every idea against.

Airflow — deliver effective cooling to the body.

Wearability — worn, not held, so hands stay free.

Comfort — no discomfort over prolonged use.

Safety — safe to wear during movement or exercise.

Accessibility — controls within easy reach.

Adaptability — works walking, sitting or resting.

After setting the needs, I decided the product had to be easily portable: worn, not held, so hands stay free while you walk or run. I took the strongest sketch forward and mapped it onto the body, sketching quickly to identify where each part could sit.

Chosen design and body placement Humpback whale study

Further development of chosen concepts

01

02

03

04

05

User testing & feedback

I developed each design further to understand how it would function: where the components would sit inside the shell, and how air would move across the body.

Each version was then prototyped in card and worn, so fit and weight could be judged on a real user.

Worn, the problems showed quickly. 01 and 02 sat too close to the neck, 03 loaded one shoulder, and 05 caught on hair. The wider, flatter forms were the most comfortable.

Why I chose 04

  • Weight spread across both shoulder blades
  • Sits clear of the neck and hair
  • Control within easy reach at the front
  • Arms and back left free to move
  • The only one to meet every need

Final design

BOM

Item No.ComponentDescription / NotesQty 1Rechargeable BatteryLi-ion1 2Microcontroller (MCU)Small, low-power MCU for fan speed + button control1 3DC Motor / Fan MotorSmall brushed DC motor suitable for portable fans1 4Push ButtonMomentary push button switch for power/speed control1 5USB PortUSB-C or micro-USB charging input1 6Connecting WiresPower + signal wiring between battery, MCU, motor, buttonAs needed 7ScrewsSmall machine screws for enclosure assembly4–6 8Cereal Grain (Extra Item)Single grain (e.g., corn/wheat/oat) included as requested4 meters

Prototype product

I built the outer structure by hand, then assembled the components inside it.

07 — Realisation

The final model

Plaited straw case
Finished Ventra shell
Salvaged fan, battery and control board

08 — Global Systems

A product anyone can make, anywhere

Ventra is designed to be made, not bought. The system below maps how it is owned, built, used and recovered.

Ownership

Local cooperatives. No single owner, no licensing fees.

Design pack

Open-sourced dimensions, modular electronics, a visual build guide.

Inputs

Reclaimed e-waste, and whatever fibre grows nearby.

Skills

Plaiting, sewing and simple soldering — skills hubs already have.

Quality

Every unit passes a circuit, heat and structural check.

Use

Markets and NGOs. Home, outdoors, and emergency cooling.

End of life

Straw composts. Electronics are recovered. E-waste teaches repair.

09 — Digital Product Passport

Branding

The Ventra brandmark: an ear of wheat straw in cream on a harvest tan ground
Brandmark

Colour

Harvest Tan#BD986A
Chaff Cream#E9E0C7

Typeface

The Ventra wordmark set in a high-contrast serif with old-style proportions

The logo

A single ear of straw. It credits the plaiters this craft comes from, and the material itself — one plant, cut and plaited by hand, doing the work of a whole product.

Colours

Inspired by the straw itself — the tan of the stalk and the pale cream of the chaff.

The wordmark

An older-looking serif with a modern twist — traditional high-contrast letterforms, drawn with cleaner, sharper curves. The same mix as the product: an old craft carried into something modern.

Physical Product Passport

Seven printed tag faces across three folded cards

A tag you can hold: Printed on recycled card and tied with jute string, three folded cards carry materials, packaging, maintenance, production, use, disposal and safety. It works with no phone, no signal and no app — the repair instructions stay tied to the product for as long as it lasts.

The folded tags tied with jute string
The tag tied to the finished Ventra shell

Digital Product Passport

DPP · Concept to prototype

A Digital Product Passport is a record that travels with a product for its whole life, covering every stage of its lifecycle: sourcing, manufacture, transport, use, repair and disposal. The EU is making them mandatory for a growing list of product categories under its Ecodesign for Sustainable Products Regulation.

01 — Low-fidelity wireframes

Working alongside other students, and from a lecture on what the regulation actually asks a passport to carry, we listed the necessary fields first — identifiers, materials, footprint, repair and end of life — then drew the page around them.

Hand-drawn wireframe of the passport page: brand name, product images, title, size, materials, a traced-steps map and the process row Hand-drawn notes on the data a passport must carry: carbon and water measures, identifiers, repair and reuse, and the footer links

02 — Further development & high-fidelity screens

Digital product passport prototype: six core screens, three footprint tab states, seven overlay sheets and the expanded details state

03 — Interactive prototype

04 — The key screens

The passport home screen: verified chip, product photo, identifiers and the key figures for this unit

The passport

Every unit carries its own record

  • Identifies the exact item, not the product line
  • Shows who issued the record and when it was last verified
  • Surfaces the headline figures up front
  • Routes into every deeper screen
The product journey screen: a map of all six steps within 40 miles, with each step listed below

The journey

Every part, back to where it came from

  • Maps every step the product took to exist
  • Names who did the work at each stage
  • Records transport mode and distance between steps
  • Traces each material and component to its source
The product footprint screen: 2.12 kg CO2e broken down by stage, with a donut chart and per-stage bars

The footprint

Numbers you can actually check

  • Breaks the environmental cost down by lifecycle stage
  • Separates carbon, energy, water and nature
  • Gives absolute values, not just percentages
  • States where data is missing rather than estimating it
The repair and reuse screen: how the shell comes apart, with counts for adhesives, proprietary tools and replaceable parts

Repair & reuse

Built to be opened

  • Lists which parts can be replaced
  • Names the tool and the time each repair takes
  • Says where to source a replacement part
  • Explains how the product comes apart

10 — Reflection

Business goal

Reflection

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