An offwidth crack is too big for your fist yet too small for your entire body. Offwidth is a style of climbing that most people simply avoid due to its slow, strenuous, painful, and burly nature.
“Offwidth Stacks” depicts a technique used in the smallest sized offwidth cracks. By stacking both hands on top of each other and squeezing, a climber is able to hold their body close to the wall. The challenging part of this technique though is releasing the hold to move up without falling backwards.