Unless you are an adult the size and weight of an average 10 year old girl, don't buy these for yourself.  Luckily, I have a kid who can use them since they were too small for me.  However, they are well constructed and she seems very comfortable wearing them for several hours at a time.  They haven't been tested in an actual scootering fall yet, but by looking at them I am fairly certain they can take quite a hit and keep elbows and kneecaps from serious impact damage.  At least I hope so.  Also they are very cool to look at being deep black with orange buttons.