Elastic strap that helps left the heel to prevent sudden stretch or strain to the tendon. Compression pad helps absorbs stress to the tendon. - Stabilizes the Achilles tendon. - Alleviates Achilles tendinitis. Size S-L: athlete's height up to 6'3''. - Size XL: athlete's height 6'3'' and taller. - People with larger ankles should order the XL. Imported.