Recommendation

Hi all

I am currently knitting a jumper with drops flora & air . The jumper looks really nice and it is my first time using drops flora- how does the yarn behave with time ? I liked the pattern so much that I am planning to knit it in a different colour and would like to try a different brand. Looking for recommendations for a 4ply 50gr yarn that will last very long ( no acrylic please ) 😊 Ps: I am based in the UK