10 days post-op. Looking for hair concealer/fibre recommendations. (Photos)

Hi, I had an FUE hair transplant 10 days ago. I go on holiday in 9 days time and I'm looking for a good hair concealer/fibre to cover the bald patches of hair. I'm also looking for some advice regarding if it would damage my grafts? At the moment I am feeling very self conscious as before the transplant my hair was still long and the doctor recommend shaving the lot of for better results. I return to work in 19 days time so really looking for something that will make the scalp look less bald.