Depends on how often you want to wear it and how much you want to spend. I started off with a off-brand ISSF Shooting Jacket that I took to a tent company and had quick connects clips added to it. That lasted a long time but kept on "slipping" as I would want to cinch it up super tight.
I then got a Anschutz Benke Sport edition Jacket. Very cool Jacket and good value for the money, but it was really rough on the inside and got very uncomfortable to wear towards the end on a shoot. Not to mention 3-4 days of worlds.
I fell inlove with the Kurt Thune Jacket after trying one on at the 2017 World Champs in Wales. By far the jacket I have ever had. It's not too hot in Arizona. Comfy, Adjustable. Washable. and fairly easy to pack when traveling.
I would 100% recommend this if you intend to shoot FT for the foreseeable future.