jeans

Q:

1. I would like to know if Muslim men and women are allowed to wear jeans.

2. Also are you allowed to wear shirts made out of jeans material. Please could you explain. 

Q: Is wearing jeans for women under abaya haraam or makrooh? If yes then why? Also, ladies argue that if you say that wearing jeans is tashabbuh bil kuffar or tashabbuh bir rijaal then why do we wear tights which is more revealing than jeans?

Q: Is it permisble to perform salaah wearing skinny jeans/ leggings/ tight fitting clothes?

Q: Can Muslim men wear jeans pants? Is it like imitating kuffaar?