Cycling in extreme conditions is easy. Dress as lightly as possible for summer, and insulate like hell for the winter. Fall and spring are trickier, though, as temperatures can change radically throughout the day and the in-between temps often defy our best efforts to dress appropriately. Castelli's LW Head Thingy Neck Gaiter is one trick for solving this conundrum, as it adds a layer of protective material between a chilly fall morning and your delicate visage without loading up on suffocating thermal layers. It's lightweight Soft Flex material is gentle on your face and ideal for everything from long descents in the high mountains of summer to easy spins on brisk, spring afternoons.