45NRTH Ragnarok BOA Cycling Boot - Black Size 4645NRTH Ragnarok BOA Cycling Boot Black Size 46. Ragnark BOA boots are perfect for the hard to predict weather of late fall and early spring. Built to block cold and moisture these lightweight cycling boots feature a 25F+ ( 4C+) comfort range to keep feet warm and dry through the chill of late autumn and early spring rides. Rated for 25F+ ( 4C+) comfort Waterproof breathable membrane to manage moisture Neoprene ankle cuff to keep out moisture and road