Shoe heel pads from Mars Wellness are highly recommended to treat achilles tendon, sore and bruised heels. These achilles inserts are made of NEW 100% firmer wool felt which provides firm support, comfort and relief. Perfect placement of these soft and comfortable shoes inserts for achilles heels help to correct leg length discrepancies. The shoe back heel pads come with incredible easy to peel off back with adhesive to keep it secure at the best position in the shoe. The width of the your shoe heel should be equivalent to the width of the heel pad.All Heel Pads can be used for cushioning but the Felt Heel Pads can also be used for Limb Length Discrepancies because it won't compress as much as Foam