On day one this ecru twill has this lovely crunchy, crispy feel to it. Dead nice. But after you’ve worn it a lot it’s going to start to soften up and take your shape. That’s going to feel even better.
If you want to keep that day one ecru colour, dry clean it. Alternatively the washing machine will make the twill even softer and paler. It's hard to pick which is nicer. If you go for the machine wash, it’s best to wash on it’s own and cool.