Those are only for children. They are shoes, so age restricted.
- Three recolorable areas: shoes, soles and laces (see picture below)
- Available for everyday, formal, athletic, and outwear (if Seasons is installed)
- Download file contains both .S3P and .package version, install the one you prefer
If you do not have Seasons installed, you will still find the shoes under everyday/formal/athletic.
See the female adult post for more details about having Seasons or not.
The blade actually 'sinks' in the floor. It is how EA made them, so I suppose they elevated the sims for their skating animations. If you have Moon and Psycho's ice skating poses or just want to use any other non related poses, use an OMSP with 8-10 cm and it will fix the 'problem'.
For pose makers, here is Orangemitten's tutorial on how to chose an outfit for a pose (shoes in this case, you need to replace the feet). This will allow to make poses without needing any OMSP as they should be at the correct height.
Poses: EA & Kilhian
Hair: Newsea & EA Seasons
Clothes: EA (mostly Seasons)
Mesh: EA Seasons