How can i sew flexible knee's and elbow joints?

[tjjLeather]

Ive been looking for a long time now. I am trying to find how to sew in flexible elbows and knees on jackets and pants and catsuits. 

If anyone has a pattern or design for flexible knees and elbows that would be great.

[fredk]

I don't understand your problem. If you use the correct grade of leather the elbows and knees will flex

[oltoot]

It would require one of two things; first choice layout so that knee and elbow joints come from flank parts remembering that doing any leather project right means lotsa waste (a good shop layout includes a big scrapbox) and the next choice (worst) would be to include a v shaped gusset in your pattern, making the smaller insert piece from really light stuff.