The bowline knot is a non-slip loop which can be used for climbing, rescue, and everything in between. This and a square knot are your two best friends. Bowline… | Bowline knot,
Figure Eight Knot - How to tie a Figure Eight Knot
Rock and Tree Climbing Knots: Basic Guide with List
10 knots every Arborist, Rigger and Rope Access climber should know – Reecoil