Thermaltrex
Sleeping Bag for SEASONFORT
Fires kill and injure. Campsite fires have a need for family safety. To do this a machine washable fire retardant polar fleece sleeping bag was made permanently fire retardant; without chemical treatments. To do it, they designed Thermaltrex; a fire retardant polar fleece which is breathable, cozy warm, washable, fast drying, light weight and meets the most toughest chemical standards in Europe e.g. Reach, plus airline blanket fire standards. Lay in it. Walk in it via dual zips, join two units together to make a double; all with confidence of safe fire protection without chemicals.
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Thermaltrex by Tony amp Lisa Clark
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Sleeping Bag by Tony amp Lisa Clark
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Tony amp Lisa Clark Thermaltrex
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Tony amp Lisa Clark Sleeping Bag
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SEASONFORTBrand Logo
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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.
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.
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.
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.
Image Credits
Seasonfort video and photos in-house.
Project Overview
Thermaltrex Sleeping Bag has been a Silver winner in the Outdoor Gear and Camping Equipment Design award category in the year 2024 organized by the prestigious A' Design Award & Competition. The Silver A' Design Award celebrates top-tier designs that embody excellence and innovation. This award acknowledges creations that are not only aesthetically pleasing but also highly functional, reflecting the designer's deep understanding and skill. Silver A' Design Award recipients are recognized for their contribution to raising industry standards and advancing the practice of design. Their work often incorporates original innovations and elicits a strong emotional response, making a notable impact on the improvement of everyday life.
Silver Recognition
Tony & Lisa Clark was recognized with the coveted Silver A' Design Award in 2025, a testament to excellence of their work Thermaltrex Sleeping Bag.
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