I haven't experienced any so far but if I had to guess it would be the knit material part of the shoe.it does seem like it would rip or not last but I can't personally say
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They're kind of like those knitted Nike shoes only without the hideous look. This is a great upgrade from the former Speedforms that would eat away at your .
Shop Under Armour for Men's UA Threadborne Slingwrap Lifestyle Shoes in our. Threadborne knit upper for a breathable, compression-like fit that delivers .
. UA SpeedFormÂ® Slingshot Running Shoes in our Women's Running Shoes. to toe quicker than ever before; 3D knit upper features woven in DyneemaÂ®, the .
Shop Under Armour for Men's UA SpeedFormÂ® Slingshot Running Shoes in our. to toe quicker than ever before; 3D knit upper features woven in DyneemaÂ®, .
Shop Under Armour for Men's UA Slingflex Rise Running Shoes in our Men's. NEUTRAL: For runners who need a balance of flexibility & cushioning; Knit .
Learn about the technology & innovations that power the Under Armour family of SpeedForm shoes. This is what fast feels like.