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Thermaltrex Chikwama Chogona by Tony and Lisa Clark

Thermaltrex Chikwama Chogona by Tony and Lisa Clark is a highly esteemed winner of the very prestigious 2025 Mphoto ya Siliva ya A' Design Award in Mapangidwe a Zida Zokambira ndi Zipangizo za Panja Competition Category.


SilivaZida Zokambira· 2025

Thermaltrex Chikwama Chogona

by Tony and Lisa Clark

Client: Seasonfort

Mphoto ya Siliva ya A' Design Award Winner in Zida Zokambira Category

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The Design

About Thermaltrex Chikwama Chogona

Thermaltrex ndi chikwama chogona chosapsa mosavuta ndi moto chopangidwa kuti chizigwiritsidwa ntchito pokakhala msasa komanso panja. Chikwama chogonachi chapangidwa kuchokera ku nsalu ya polar fleece ya 330gsm yomwe imakhala yosapsa mosavuta ndi moto nthawi zonse, popanda kugwiritsa ntchito mankhwala kapena zokuta. Nsaluyi ikhoza kuchapidwa mu makina ochapira, ikhoza kukonzedwanso kuti igwiritsidwe ntchito kachiwiri, mitundu yake sichoka, komanso sivunda mosavuta, ndipo imatetezanso ku dzuwa. Zikwama ziwiri zikhoza kulumikizidwa pogwiritsa ntchito ma zipi omwe amatha kutsegulidwa mbali zonse ziwiri kupanga chikwama chogona cha anthu awiri, ndipo mbali ya kumapazi ikhoza kutsegulidwa kuti chikwamachi chivalidwe poyenda. Chikwamachi chimasungidwa mu thumba losalowa madzi la malita asanu ndi limodzi lokhala ndi zogwirira ziwiri.

The Recognition

About the Mphoto ya Siliva ya A' Design Award

Thermaltrex Chikwama Chogona ndi mmodzi mwa opambana a Mphoto ya Siliva ya A' Design Award, kuzindikirika kolemekezeka modabwitsa komwe kumaperekedwa kwa mapangidwe a pamwamba, okongola ndi ochititsa chidwi. Opambana a Siliva ndi ntchito zowala kwambiri ndi zolenga kwambiri zomwe zimaonetsa ukatswiri, luso ndi nzeru zakuthwa za opanga awo. Thermaltrex Chikwama Chogona akuyembekezeka kukhala ntchito yodabwitsa yoonetsedwa, yaukatswiri wapadera ndi yatsopano kwambiri. Mapangidwe opambana Mphoto ya Siliva ya A' Design Award awa ndi chopangidwa chodziwika kwambiri ndi choyamikiridwa chomwe chimapindulitsa ndi kukulitsa malire a luso, sayansi, kapangidwe ndi ukadaulo. Thermaltrex Chikwama Chogona ndi cholengedwa chomwe anthu ambiri amachichitira nsanje, chomwe chimadzutsa zilakolako, kubweretsa maganizo abwino ndi kuyatsa kudabwa ndi chidwi.

Behind the Design

Press Kit

Credits, team members and technical details provided by the designer.

Unique Properties
Our new Seasonfort Sleeping Bag is permanently Fire Retardant with no chemical treatments or coatings.

To do this we designed Thermaltrex, a warm 330gsm polar fleece machine washable recyclable fabric; which meets both the Faa 4 ply Airline Blanket and en71 2 Child Safety fire standards. Natural chemical safety allows it to pass the worlds toughest European chemical safety standard Reach, and is without formaldehyde or azoic dyes. It is colourfast, mildew resistant and offers upf50 sun protection.
Dimensions & Packaging
1kg rectangle sleeping bag is 190 x 79cm. Make a double size 190 x 159cm by zipping together 2 units. Silver reflective ropes to see in low light and pull Ykk reversible zips. Users can unzip the footend and walk around in warmth. Black nylon trim at head-end complements two woven labels, Seasonfort and ThermalTrex brands. Alongside is a green and blue ribbon denoting profits from sales assist Tony and Lisa Clark's homeless charity, Backpack Bed for Homeless. En13537 Sleeping Bag Celsius ratings, Extreme at 1C, Comfort at 15C. Stowed in multi-use 6L dry bag, one handle each end, digital logo print.
Tags
sleeping bag, fire, safety, fire retardant, Seasonfort, camping, textiles
Production Technology
Our not for profit social enterprise Seasonfort, founded by Tony & Lisa Clark, was created to help fund our life-saving Thermaltrex fire retardant polar fleece sleeping bags for homeless; 19,500 distributed to date.

To create our vision of safety - without any fire retardant chemicals - we made our new textile Thermaltrex to ensure every fibre was fire retardant, machine washable and recyclable.

Thermaltrex fabric is recyclable; shredded, de-polymerised, then repolymered again e.g. into PET plastic bottles or industrial plastic products.

In comparison to traditional polar fleece the cost difference is approximately 30 percent. A breakthrough for safety.
Design Challenge
Tony Clark initially was searching for a low cost way to make fire retardant sleeping bags for homeless people sleeping on the street.

For safety the fabric should not use chemicals.
The fabric must self extinguish a 1 inch flame for 12 seconds.
It must not use price prohibitive yarns or fibres e.g. Kevlar.
The fabric must be affordable for mass market safety.
Research
To reduce final production costs the material needed to be both synthetic and recyclable. This logically narrowed down the fibres and yarns that could be used. Next was to combine different materials and yarns at various ratios; which required a trial and error approach.

After each trial and error, materials would be tested in-house in various ways. Tests was grouped into 4 sets; fire, chemical, material and product. Upon success, all production would be tested at an independent lab test.
Inspiration
Street sleeping homeless need a fire retardant sleeping bag that could be washed.

Fire kills and injures. All campsites and outdoor fires often spit fire.

Today, sleeping bags are made of a polyester, nylon shell; which can easily ignite, spread fast and melt on the skin.

Sleeping bags are rarely washed, any sleeping bag that claims to be washable is usually damaged while washing; filling is damaged, clumps, creating uneven warmth and cold spots.
Project Duration
Product and fabric designer Tony Clark took 3 years to research, design and verify that Thermaltrex results could be repeated.

Thermaltrex polar fleece could not be made in Australia. Tony spent much time overseas. After much trial and error samples were made with various different textile mills; success finally happened.

Before independent test labs, major product testing occurred in Australia in-house lab.

With this knowledge, Tony could then apply theories into reality and final repeated success.
Operation Flow
Users of the Seasonfort Fire Retardant Sleeping Bag enjoy multiple functions.

Two units can be joined together to make a double sleeping bag.

The Ykk reversible rail zips also allows users to open the foot end of the sleeping bag and walk around wherever they are; cozy and warm.

Instead of a typical drawstring stow bag, the Seasonfort Sleeping Bag is stored in a 6L dry bag with two handles. An additional functional dry bag is handy when camping. The sleeping bag does not need to be carefully rolled to be re-packed into the dry bag; instead it can be stuffed back in quickly without hassle.
Patents
Seasonfort and Thermaltrex are registered word marks and trademarked in major jurisdictions globally.
Team Members
Textile designer of Thermaltrex: Tony Clark
Sleeping bag designers: Tony Clark and Lisa Clark
Dry bag designers: Tony Clark and Lisa Clark
Founders of not for profit social enterprise Seasonfort and Thermaltrex: Tony and Lisa Clark
Founder of homeless not for profit charity - Backpack Bed for Homeless: Tony Clark
Image Credits
Seasonfort video and photos in-house.

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