Fit Cuffs – Complete V3.1 Hard Case + (LOP Device). Fit Cuffs is a state-of-the-art Training System exclusively developed for Blood Flow Restriction (BFR) Exercise. Fit Cuffs works by inflating solid yet pliable cuffs using a solid pump/pressure gauge and durable metal quick-disconnectors. This edition includes the Arm Cuffs V3.1 developed for swift single-handed attachment and the curved/cone Leg Cuff V3 that has a wide velcro attachment area which allows for a customizable fit. By changing the placement of the velcro strap you get a personal fit that will accommodate any thigh shape. By design, this variable-contour Cuff can be adjusted to any thigh shape and size providing a personalized fit and resulting in an optimized pressure distribution during exercise. This edition includes the Bluetooth Device developed for the measurement of Limb Occlusion Pressure (LOP), as a convenient and validated alternative to handheld Dopplers. (2 x Leg Cuffs V3.1 45-85 cm / 17.7-33.5 Inch + 2 x Arm Cuffs V3.1 20-50 cm / 7.9-20 Inch). One-Size-Fits-All.