Twisted X Brown Pebble-12" Top Work Boots. This boot features a steel square toe, leather construction, 12" top, rubber sole, double stitch welt, and a walking heel. Twisted X is dedicated to making better boots. Twisted X boots use newer technology, stronger and lighter weight components, and new tanning processes, as well as newer and more consistent manufacturing techniques. Twisted X technology gives you more durable, stable, light weight, breathable, and comfortable boots.