Michael Wilkinson designed the costumes for Batman in "" (2016). Director Zack Snyder tweeted a photo of the first Batsuit for the film on May 13, 2014. It is influenced by the Batsuit seen in "The Dark Knight Returns", and is noted by Bruce and Alfred to include additional armor to compensate for Bruce's greater age, as well as a device in the cowl to alter Bruce's voice when in the suit. The Batsuit is made of a Kevlar-titanium weave, is highly durable, making it resistant to knives and low-caliber firearms, the cowl and neck area of the suit consists of fabric-coated titanium alloy plating, protecting his neck and head from blade injuries and small-caliber firearms (a man using a knife could only cause sparks to fly when trying to stab Batman in the back of the neck). Not even bullets can pierce the suit at point-blank range, but some areas are somewhat vulnerable as a thug is successfully able to stab Batman with a knife in the upper arm. The cape also provided for gliding capabilities, although Batman rarely uses this, relying on the Grapple Gun instead. A second Batsuit was unveiled at ComicCon 2014, and unlike the first which is made of cloth, it is armored and features illuminated white eyes. In the film, Batman's armor is a powered exoskeleton built by him and Alfred Pennyworth to counter Superman's strength as well as to protect Batman from Superman's attacks. It is also armed with a grenade launcher to fire kryptonite gas grenades and a kryptonite spear, both of which are necessary to weaken Superman to the point where Batman can fight him directly. The armor is damaged in the fight with Superman, prompting Batman to return to his usual costume when he departs to save Martha Kent from her abductors.