I just traveled with the 30-L Ultra Dragonfly and a small sling/waist pack on a 2-week trip that included two planes, an overnight train, two subway systems, and lots of walking and running with the pack on to get from place to place
Since then, Giro has produced some of the most innovative and market-leading helmets catering for the trail and gravity market since not to mention shoes, jackets and apparel
And while 20 liters isnt enough to fit much more than an ultralight quilt , sleeping pad, and a bivy, it is large enough to fit those items if youre willing to go without much else
For a piece of gear this important, knowing it's covered for life changes the math
No Name: John Excellent fit and feel I love the fit and comfort of this helmet