I just received a pair of cut-resistant gloves. I got them because I love my mandolin, but find its guard a bit too cumbersome to work with. I’m not planning on slamming my fingers against the blades, but I don’t want to find out via missing fingertip that ‘cut-resistant’ isn’t up to the task.
Stick a carrot in there and chop away? Find a hotdog and see what happens? Anyone have experience with these things and trust them?
Cut level 5 is pretty good. Glass handlers use cut level 3 gloves.
You need a tomadynamometer, some 100mm straight edge blades, some calibrated weights, and a copy of ASTM F-1790-05, Standard Test Method for Measuring Cut Resistance of Materials Used in Protective Clothing.
Or, get a skin-on hot dog and a cleaver.
Just gotta say, this bluegrass picker was momentarily thrown for a loop. 
Well that didn’t go as expected.
I wrapped a carrot in plastic, jammed it into one of the fingers, and made a modest cut with an 8" chef’s knife.
SHUNK
It went through the glove with nary a pause.
I tried a lighter touch, and it still sliced through the glove.
These aren’t super knives. They’re very sharp, but not surgically sharp. I wasn’t planning on hacking at my fingers (my main concern was accidentally smashing into one of the mandolin blades), but the product description made me think they’d have at least put up some effort against being cut like that.
Gee, I was hoping it would work. It would have saved me the cost of going to the ER last weekend after using a (damned) mandolin to slice a cucumber. No “major” damage, just a tip of my right ring finger, but boy it still smarts.
Sounds like maybe you got a defective pair.