When I opened up the parcel the doormat seemed extremely thin. However it fitted exactly into tha space for it and quickly proved that it picks up everything from the soles of  visitors' shoes
Also I realised that by being thin it did not catch on the door when it was opened and looked very stylish. 
The only downside is that because it is so effective, I keep having to vacuum it..
You can see from the photo how it picks up bits successfully.