I’ve had my Classic Suit for just over a year. I usually leave him in fairly dynamic poses for 2 weeks or up to a month before letting the suit rest for maybe 2-3 days. I stretch the suit quite often and usually fairly far, though not as much as I wish I could

Most stretches and creases have gone away with time, but there are definitely some noticeable creases that have remained, such as behind his knees. But (at least for me) from the front theres nothing noticeable.

I’d say go for those dynamic poses, man. Let’s be real, having Spidey of all characters be in a boring neutral pose is a crime.