Ultimate Guide – Fusion
What Is Fusion?
Fusion (FUSION Sportswear) is a Danish performance apparel brand founded in 1999, built on over two decades of in-house testing - including its own wind tunnel - and close collaboration with elite triathletes. Best known for its TEMPO! range of tri suits, Fusion designs race-day apparel that's been proven at the highest level of the sport, worn by athletes such as Sam Laidlow, Magnus Ditlev and Daniel Bækkegård.
Where Is Fusion Based?
Fusion is headquartered in Svenstrup J, Denmark, and manufactures its apparel in its own factory in Lithuania, using premium fabrics sourced from Italy and France. This "Made in EU" model keeps the supply chain short and quality control tight, from fabric to final stitch.
Is Fusion A Good Brand?
Yes. Fusion stands out for pairing genuine race-day pedigree with rigorous in-house development:
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Every TEMPO! suit is validated in Fusion's own wind tunnel for real aerodynamic gains, not marketing claims.
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Fabrics, thread, zippers, elastic and labels are STANDARD 100 by OEKO-TEX® certified.
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Sam Laidlow won the 2023 IRONMAN World Championship in Nice wearing the TEMPO! and just broke the full distance triathlon World Record in the TEMPO! PRO TRI SUIT in a time of 7:21:04 at Challenge Roth 2026.
For triathletes who want a suit that's been tested in a wind tunnel and proven on the biggest race-day stages, Fusion is regarded as one of the most credible tri suit brands in the sport.
Our Favourite Fusion Products
Key Features → Elite-level race suit and formerly the pinnacle of the TEMPO! range. UPF 50+ sun protection. Two integrated front nutrition pockets. Soft, elastic fleece pad made in Italy. Water-repellent lower body fabric. FUSION Powerlock stitching for durable seams. Durable YKK front zipper. Made in EU.
Who It's For → Competitive elite athletes and age groupers chasing podiums or Kona qualification, with a recommended average bike-split speed of 37-44 km/h. Suited to long-course racing (8-11 hrs) and middle-distance (4-6 hrs). Sizes XS-XL, plus Tall options.
Fit & Sizing → Tight, close-to-body fit - choose your normal size, or go one size up if you're between sizes or prefer more room. Race with the zipper fully open for the swim and run legs, and fully closed on the bike, where the close fit encourages an optimal TT position.
Key Features → Fusion's premium speedsuit, tailored specifically for female athletes. Highest sun protection (UPF 50+) on the upper body. Two integrated energy pockets. Elastic YKK front zipper. Soft, elastic fleece pad made in Italy. FUSION Powerlock locked seams. Sponsor logo compatible on the White/Grey colourway.
Who It's For → Competitive age-group women targeting record-breaking pace, with a recommended bike-split speed of 37-44 km/h. Suited to long-distance (8-11 hrs) and middle-distance (4-6 hrs) racing. Sizes XS–XL.
Fit & Sizing → Tight, close-to-body fit designed to move with you - choose your normal size, sizing up if you're between sizes or want extra room.
Key Features → The balanced all-rounder of the Fusion lineup. UPF 50+ sun protection with a breathable mesh front. Four easy-access pockets across the thigh and back. Full-length separating YKK zipper. Silicone-lined hem to reduce ride-up. Water-repellent leg fabric. Comfortable fleece chamois pad.
Who It's For → Experienced triathletes who want high performance without the ultra-tight focus of the ONE or PRO suits - widely considered the smart choice for the majority of Ironman finishers. Recommended bike-split speed of 32-37 km/h, suited to long-course finishes of 9-11 hrs or middle-distance of 4-6 hrs. Sizes XS-XXL.
Fit & Sizing → Tight, close-to-body fit - choose your normal size, sizing up if between sizes.
Tempo! THREE Tri Suit (Unisex)
Key Features → The entry point into the TEMPO! range (formerly Fusion's Speed Suit V2). Five accessible energy pockets across the thigh and back. Separating front zipper for easy on/off. UPF 50+ sun protection. Free-cut band with silicone grip at the sleeve and leg endings. Fleece chamois pad. FUSION Powerlock seams.
Who It's For → First-time triathletes and beginners who want comfort, flexibility and ease of use without giving up on core performance. Recommended for long-course finishes of 11+ hrs or short-course of 6+ hrs. Sizes XS-XXL.
Fit & Sizing → Regular, standard fit that moves naturally with the body - choose the size you normally wear.
Key Features → Aerodynamic compression sleeves built for speed, with a snug fit and silicone grip to keep them anchored in place. FUSION Powerlock locking seams for durability. Fabric sourced from Italy. Unisex, Small-Large.
Who It's For → Triathletes and runners chasing marginal gains on race day, or wanting extra calf support through training - pairs naturally with any TEMPO! suit for a complete race-day setup.
Final Thoughts
Whatever your experience level or target race distance, there's a Fusion TEMPO! suit built for it - from the beginner-friendly THREE through to the elite-focused ONE, with the TWO covering the vast majority of Ironman finishers in between. Every suit shares the same DNA: wind tunnel-tested aerodynamics, OEKO-TEX® certified fabrics, and genuine race-winning pedigree from two decades of Danish design and EU manufacturing. Round out the setup with the TEMPO! Calf Sleeves for race day.
Ash Miller
Dietitian and Nutritionist (Masters)
Bachelor of Physical and Health Education
Instagram: @ashthomo_nutrition
References
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Fusion Sportswear. Triathlon Suits collection [Internet]. Available from: https://fusionworld.com/collections/triathlon-suits
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Fusion Sportswear. TEMPO! ONE Tri Suit (Men) [Internet]. Available from: https://fusionworld.com/products/tempo-suit
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Fusion Sportswear. Women's TEMPO! ONE Tri Suit [Internet]. Available from: https://fusionworld.com/products/womens-tempo-one-suit
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Fusion Sportswear. TEMPO! TWO Tri Suit [Internet]. Available from: https://fusionworld.com/products/tempo-two-suit
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Fusion Sportswear. TEMPO! THREE Tri Suit [Internet]. Available from: https://fusionworld.com/products/tempo-three-suit
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Aid Station. Fusion TEMPO! Calf Sleeves – Carbon [Internet]. Available from: https://aidstation.com.au/products/fusion-tempo-calf-sleeves-carbon
Disclaimer:
This content is for general information only and reflects publicly available product information from Fusion Sportswear and Aid Station at the time of writing. Please confirm current pricing, stock and sizing on-site before purchase.
