YYF 100% polyester! So awesome string! The best IMO
Sick String
I’ve given up on 100% poly. 50/50 is a whole lot better at keeping string tension in my opinion.
White YYE 100% Poly. Who needs fancy colors when white string plays just as good.
Snacktimestring.com!!! Great yoyo strings handmade from Bradley. Great deals, good slacks and the strings feel great on your fingers. I’m actually waiting for a pack of 50. The company has a deal where you can buy a mystery 50 pack with all kinds of different colors 
anyways great strings lovem and throwem all day 
I’m a really big fan of Alchemy. Other than that G-string is great. In reality, i have no problems with any string. To me its fun to try all different kinds.
I use Highlights and sometimes YYE 100 poly string.
This is a rhetorical question for me. 
HINT: AirGlow String
YYE poly is the best in my opinion, but im almost out, but it’s still the best. SSE is pretty sweet too.
G-string and highlights.