Castelli Viva Thermo Skully Cap

<i>Outside</i> reviews the best gear in the 2011 Summer Buyers Guide, including the Castelli Viva Thermo Skully Cap.

Castelli Viva Thermo Skully Cap (Photo: Courtesy of Castelli)

Published June 7, 2011 12:00AM

The sheer Castelli Viva Thermo Skully Cap slides neatly underneath your helmet and adds warmth on those 2 a.m. laps.