Bioracer Race Proven AS Stratos bib shorts review

Fast drying race day bibs with surprising weather resilience

Our rating 
4.5 out of 5 star rating 4.5
GBP £110.00 RRP
Bioracer Race Proven AS Stratos bib shorts

Our review

Super fast drying and semi water repellent all-condition race short
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Bioracer’s sponsored team riders told the Belgian company’s designers that they wanted a fast drying, lightweight short for race day use. Be it damp from the sweat on hot days or rain on less clement ones, reducing the mass of the short itself and minimising water retention were key goals.

  • Highs: Light, dry and no-nonsense bibs
  • Lows: Only the relatively high price

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Coating individual fibres with a hydrophobic coating took care of the water repellence and retention issues but, to reduce weight without becoming overly see-through, new weaving techniques were required. The outcome of Bioracer’s research was a 40 percent lighter fabric and, in a world of marginal gains, it can all help.


During testing, the shorts always felt dry and are able to quickly move away sweat or rain moisture. The minimalism theme continues with a single thickness perforated foam pad. Despite the lack of bells and whistles, we had no issues here. They are available in custom, fully sublimated designs to order and if you can find a stockist, you will not be disappointed.

Product Specifications


Name Race Proven AS Stratos (15)
Brand Bio-Racer

Description Fast drying and lightweight.