This sock is worn at night to provide additional stretch for the Achilles tendon. This is the most comfortable night splint we have found. We recommend this as step 3 in our 3-step process for the alleviation of heel pain.
For sizing, please note that the regular size fits calf size up to 16 inches around and the large fits calf size up to 16-21 inches.
Please note: this product is not returnable.