The larger oval shape pieces include pre-cut inner holes for creating a 'donut' for the blister to fit in. Adventure Medical Kits Moleskin Pre-Cut Blister Dressings
Features: Super soft flannel prevents friction on hot spots Superior adhesive backing keeps dressings on skin longer Pre-cut holes to build up Moleskin aroung blister to prevent rubbing & eliminate pain Comes with alcohol wipes (6) Contains 2 large oval, 4 medium oval, 4 medium toe, 6 small toe & 6 small strips.