District Vision
For its SS27 collection, District Vision commissioned the design of several performance running garments.
The collection features a statement insulated vest combining wool and Polartec®, bringing a more crafted sensibility to technical performance wear.
Additional pieces include a long-distance racing bib, a more relaxed training bib, and running shorts.
- Performance Lab complete fit - black
- Performance Lab vest
- Performance Lab complete fit - white
- Performance Lab tights
Salomon Slowcross
SlowCross is an experimental, entirely handmade reinterpretation of the Salomon Speedcross, exploring performance through vernacular design, repairability and low-tech manufacturing.
Inspired by the traditional wooden architecture of Austria’s Vorarlberg region, the project translates principles of local craftsmanship and adaptive construction into footwear. Challenging technological excess, SlowCross proposes a more grounded approach to innovation, where repair and contextual relevance become integral to performance.
- Performance Lab complete fit - black
- Performance Lab vest
- Performance Lab complete fit - white
- Performance Lab tights
APR-Mag
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UYN Sports
Joining UYN Sports in September 2024, I was appointed to establish and lead its new Outdoor department, developing two categories: Arnyca, dedicated to trekking and entirely designed by me, and Dolomya, focused on trail running and developed in collaboration with design studio Rayon-Vert.
Debuting with FW26, the collection draws on UYN’s expertise in advanced knitting technologies, combining technical performance with predominantly bio-based cut&sew materials and a cohesive design language across apparel and footwear.
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ROA Hiking
Joining ROA Hiking in 2023 under the creative direction of Patrick Stangbye, I contributed to the design, development and CMF of the brand’s entire footwear collection.
My work spanned seasonal collections and collaborative projects, including ROA’s partnerships with Altra and and wander, alongside the development of the Hida, a new mountaineering silhouette introduced for FW25.
- Hida High - Mountaineering boot
- PFW SS25 - Footwear selection
- FW24 - Roa x Altra Timp5 GTX
- SS25 - Arpy Sandal
- FW25 - And Wander Cingino
- SS25 - Katharina Canvas Pack
ON Running
During my time at On Running, I designed the Cloudtrax, a hiking sneaker bridging outdoor performance and contemporary aesthetics. Developed in collaboration with the footwear design team, the silhouette explores refined proportions and innovative material combinations, offering a contemporary approach to hiking footwear aimed at a younger audience.
- Cloudtrax - Chai/Ivory
- Cloudtrax - Reseda/Lavender
Ableton
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Scheme.ist is the independent creative practice of Julien Chaintreau, a French-Swiss designer currently based in Paris (FR). Graduating an Industrial Design BA from ECAL (CH) in 2018 and later from the Design Academy Eindhoven (NL) with a Geo-Design MA in 2022 under the direction of Formafantasma, I developed a pluridisciplinary practice combining technical expertise with ecological and cultural perspectives.
Following professional in-house design experiences at Ableton, On Running, ROA Hiking and UYN Sports, where I led the development of its Outdoor department, I established scheme.ist as my creative consultancy in early 2026. This independent creative studio operates across footwear, apparel and creative strategy, bridging product development, design research and cultural analysis. Alongside commercial collaborations, the practice explores alternative approaches to craftsmanship, manufacturing and contemporary performance culture through material experimentation and editorial writing.