Gibbon Slacklines DVD/Treewear Combo Pack Combo pack includes slacklining fundamentals video and a set of Treewear DVD offers 23 minutes of instruction and 15 minutes of bonus features Treewear is a set of two felt pads with Velcro closures to protect trees and slacklines Learn to set up your Gibbon slackline, get on the line, walk, turn, and perform basic tricks Slacklining develops balance, fitness, and a fun challenge for kids and adults