In the latest law changes released by IFAB, Law 4 (The Players' Equipment) states:
Non-dangerous protective equipment, for example headgear, facemasks and knee and arm protectors made of soft, lightweight padded material is permitted as are goalkeepers’ caps and sports spectacles."
This obviously includes Battle-sox, which uses soft, lightweight padded material (albeit patented and with the ability to "harden on impact"), which improves performance and has the added benefit in offering protection to the instep (kicking) zone.
Therefore, wearing Battle-sox is safe and comfortable, enhances kicking performance, and offers protection to the instep. Buy a pair today!
2016/2017 Laws of the Game