The author suggests using old socks as an inexpensive wrist protection against thorns when cutting back woodland brush.
I'm clearing woodland of vicious vine with double-edge thorns that make bloody ribbons of exposed flesh. For protection I wear heavy jeans stuffed into boots, a thick shirt, leather gloves, and a tied-on wide-brim hat to protect my face. My wrists still suffered, though, as I reached out and up. So I cut off the foot sections of worn-out socks as an inexpensive wrist protection against thorns. Works fine!