Armor and Ballistic Shielding Selection Guide: Types ... Kevlar 29, the type of Kevlar used in bulletproof vests, is relatively lightweight. Other high-strength textiles used in armor and ballistic materials are made of heterocyclic aramid fibers; poly- or para-phenyleneterephthalamide (PPTA); ultra high molecular weight polyethylene (UHMWPE); and polyphenylene-2,6-benzobisoxazole …