A wearable protective device comprising: a bottom surface configured to be positioned adjacent a surface of a user's body and an opposing top surface :a flexible section (230. 430) comprising: a first expansion region disposed in a medial region of the wearable protective device, comprising une or more perforations extending through a medial edge of the wearable protective device to provide expansion of a medial edge of the wearable protective device when pressure is applied to the bottom surface; a second expansion region disposed in a lateral region of the wearable protective device, comprising one or more perforations extending through a lateral edge of the wearable protective device to provide expansion of a lateral edge of the wearable protective device when pressure is applied to the bottom surface; and a contraction region disposed between the first and second expansion regions in a width direction of the wearable protective device comprising one or more perforations which contract when pressure is applied to the bottom surface; a first perforation-free section ; and a second perforation-free section ; the wearable protective device characterized in that : the flexible section is disposed between the first perforation-free section and the second perforation-free section in a length direction of the wearable protective device such that the flexible section has a width extending in the length direction of the wearable protective device, the width of the flexible section being in the range of 10 % to 50 % of a length of the wearable protective device. a bottom surface configured to be positioned adjacent a surface of a user's body and an opposing top surface :a flexible section (230. 430) comprising: a first expansion region disposed in a medial region of the wearable protective device, comprising une or more perforations extending through a medial edge of the wearable protective device to provide expansion of a medial edge of the wearable protective device when pressure is applied to the bottom surface; a second expansion region disposed in a lateral region of the wearable protective device, comprising one or more perforations extending through a lateral edge of the wearable protective device to provide expansion of a lateral edge of the wearable protective device when pressure is applied to the bottom surface; and a contraction region disposed between the first and second expansion regions in a width direction of the wearable protective device comprising one or more perforations which contract when pressure is applied to the bottom surface; a first expansion region disposed in a medial region of the wearable protective device, comprising une or more perforations extending through a medial edge of the wearable protective device to provide expansion of a medial edge of the wearable protective device when pressure is applied to the bottom surface; a second expansion region disposed in a lateral region of the wearable protective device, comprising one or more perforations extending through a lateral edge of the wearable protective device to provide expansion of a lateral edge of the wearable protective device when pressure is applied to the bottom surface; and a contraction region disposed between the first and second expansion regions in a width direction of the wearable protective device comprising one or more perforations which contract when pressure is applied to the bottom surface; a first perforation-free section ; and a second perforation-free section ; the wearable protective device characterized in that : the flexible section is disposed between the first perforation-free section and the second perforation-free section in a length direction of the wearable protective device such that the flexible section has a width extending in the length direction of the wearable protective device, the width of the flexible section being in the range of 10 % to 50 % of a length of the wearable protective device. <EOS>