A tree climbing suit 10 formed as a one-piece suit has a long-sleeved upper torso portion 12 and a lower torso portion 22. The long-sleeved upper torso portion 12 has two long sleeves 14 for covering the arms and a shirt portion 16 for covering the chest region. The lower torso portion 22 covers the waist region and has a pair of pant legs 24 for covering the leg portion of the wearer 2. The tree climbing suit 10 has a plurality of tree contacting gripping patches 30, 32, 34, 36, 38 sewn or otherwise affixed to the suit in locations for gripping a tree. The tree-gripping patches are located at least on the regions that are in direct contact with the tree when attempting to climb it. The tree-gripping patches 30, 32, 34 are respectively located at least on portions of the long-sleeves 14, in the chest region on the shirt portion 16, and the inseams 25 of the pant legs 24 preferably extending from pant leg 24 to pant leg 24 traversing across the crotch region of the inseam 25.