Perhaps the type of shoes worn by Olympic weightlifters is their most distinctive piece of equipment. Weightlifting shoes are typically designed with a raised heel of " to " and one or two metatarsal straps that tighten across the instep of the shoe. The raised heel helps the lifter maintain an upright torso while catching the bar and also allows for a deeper squat under the bar. The soles of the shoes are also quite rigid, helping to resist compression while under heavy loads. The shoes are designed for maximum stability while remaining flexible in the "toebox". This allows the lifter to come up on the toes and to catch the weight on the ball of the back foot during the "jerk" movement of the lift.