Human: What are some of the most popular styles of cowboy boots? Assistant: 
Some of the most popular styles of cowboy boots include lace-up, pull-on, and slip-on. Lace-up cowboy boots have a buckle or zipper closure at the top of the boot, while pull-on cowboy boots use laces to secure the foot in place. Slip-on cowboy boots have no laces or buckles, so they're easier to put on and take off.