An exercise mitt is provided for a hand or foot, and which is particularly useful in an exercise form such as yoga in which a practitioner maintains a pose or shifts body position while his/her hand or foot is in contact with a support surface. The exercise mitt is specially configured to address the problem of slippage when the practitioner is practicing an exercise form such as yoga, where the practitioner exerts pressure on a support surface in both downward and outward directions as the practitioner is practicing the exercise form. The mitt comprises a sleeve configured to fit snugly about a portion of a human extremity while permitting portions of the human extremity to extend out of the sleeve. The sleeve has inner and outer surface portions with the outer surface portion configured to contact the support surface as the wearer takes predetermined positions relative to the support surface, the outer surface portion being further configured to resist the human extremity from sliding against the support surface, and the inner surface portion being configured to resist relative movement between the human extremity and the sleeve as the wearer applies pressure against the surface and takes predetermined positions relative to the support surface.