Im growing out my hair, and i like to bun it to keep me from playing with it and causing more friction and damage, I hear bunning hair is good if you want to grow it out, the only problem is I don't know what type of hair accessories to keep my bun up..

I use metal free hair ties but find they're very tight unless I stretch them out first but what is the best type to use out of the above ..
"2 Something ATM"
Coarse, Medium- Thick, Normal Porosity

My Routine
Low 'Poo: curash soothing oatmeal conditioning shampoo
RO: tresemme naturals moisturising conditioner
LI: tresemme naturals/kinky curly knot today
Seal: mix of shea butter/coconut oil

Goals
waist length hair & finding a sexual cheapo leave in conditioner for both me and my daughter