Polypropylene fibers

In an elongated fiber product, the combination comprising a drawn polypropylene fiber prepared from an isotactic polypropylene containing at least 0.5% 2,1 insertions polymerized in the presence of a catalyst characterized by the formula:

• rac-R'R"Si(2-RiInd).sub.2 MeQ.sub.2
• wherein,
• rac indicates a racemic ligand structure;
• R', R" are each independently a C.sub.1 -C.sub.4 alkyl group or an phenyl group,
• Ind is an indenyl group or a hydrogenated indenyl substituted at the proximal position by the substituent R.sub.1 and being otherwise unsubstituted or substituted at one or two of the 4, 5, 6, and 7 positions,
• Ri is an ethyl, methyl, isopropyl, or tertiary butyl group,
• Me is a transition metal selected from the group consisting of titanium, zirconium, hafnium, and vanadium, and
• each Q is independently a hydrocarbyl group or containing 1 to 4 carbon atoms or a halogen,
• said fiber being prepared by spinning and drawing at a draw speed of at least 3,000 minutes per minute and a draw ratio of at least 3 and further characterized by having an elongation at break of at least 100% and having a specific toughness of at least 1.5 grams per diener.