The undercut hairstyle is one of the most popular short hair trends in 2021. Because the men’s undercut allows for a variety of stylish hairstyles, such as the slick back and comb over, guys prefer this cut on the sides. You can even combine the undercut and fade to get a trendy undercut fade. What’s even better is that undercut styles work well with any hair type, including straight, thick, wavy, and curly hair! Check out the cool undercut haircuts below for a look at the best cuts and styles you can create!