We put this jersey from Castelli through some serious testing during a Giant Bicycles media camp
in Mallorca, Spain, where daytime temperatures soared into the mid-90s. Photo courtesy Giant Bicycles/Sterling Lorence
The Lowdown: Castelli Climber's 2.0 Jersey
Ideal jersey for a super hot day? How about a mesh, sleeved baselayer with pockets and full front zipper? Sounds radical, but that's essentially what you get with the $130 Castelli Climber's 2.0 Jersey, which combines light weight, superb venting, and a snug aero cut that leaves little to the imagination. So is this top-tier top the perfect answer to the dog days of summer? Read on to find out.