Xavien Howard has been wearing the Sportstar Victory T-Rex Hurricane Chinstrap on his Riddell Speedflex. Sportstar chinstraps are common in the NFL because they are both comfortable and proven to absorb more contact than regular chinstraps. Howard’s is in an all-white, unbranded colorway.
You can completely customize your own Sportstar chinstrap on DicksSportingGoods.com for $30 or get the exact one Xavien wears (Victory Hurricane) at Sportstargear.com for $35.