Don't cancel training because the outside temperatures have eclipsed the temperature in your hot tub. The Santini B Rob Aero Bib Short takes the edge off the heat of summer with cooling fabrics, superior aerodynamics, and a lightweight gel insert. Santini's B Rob Aero bib shorts are constructed from Thunderbike, a Power Lycra fabric that's been treated with Coldblack technology in order to both support your muscles and to keep them cool. It provides ample return to support key muscle groups, which reduces the fatigue caused by road vibration and muscle oscillation. The Coldblack treatment reflects up to 80% of the sun's radiant energy setting it apart from non treated, black colored fabrics, which absorb as much as 90%. The makers of Coldblack technology claim that its benefits won't diminish over time and can't be washed out. While there are many factors involved in muscle fatigue, proper support and heat regulation are among the most important factors to consider if you want to finish your longest rides with anything left in the tank. The fiber strength and knit of Thunderbike also happen to give the shorts a heightened level of resistance to abrasion and durability.In addition to its supportive characteristics, Santini chose Thunderbike for its highly breathable and fast drying capabilities. This has been furthered through the B Rob Aero's incorporation of elasticized mesh braces in order to increase breathability in key areas. The main body of the shorts are Power Lycra and extend above the waistline, providing support to the lower abdominal and your sides. Meanwhile, the mesh braces drop low on the back while tracing your obliques in the front. This interplay of Lycra and elasticized mesh creates a useful balance of support and ventilation on hot days. Additionally, soft silicone leg grippers make for a solid vertical hold without the fussy binding and pinching that's all too common in leg cuffs.Because Santini knows that the best designed bibs aren't w...