In the passage, William reflects on the remnants of Eddie’s belongings he has stored in a cupboard. He finds a pair of distressed jeans that, despite their wear, seem to fit perfectly and give him a youthful appearance. As he examines himself in the mirror, he acknowledges how the jeans, paired with a blazer, embody the ideal of "casual smart." This outfit gives him confidence, suggesting that one can appear polished and put-together with minimal effort, conveying a sense of style and self-assuredness.

The jeans symbolize a balance between comfort and sophistication, allowing William to feel presentable in various social situations. He appreciates the way his appearance is transformed by this simple yet strategic choice of clothing. Ultimately, the passage captures the notion that fashion can enhance one’s sense of self, making them feel capable and ready to engage with the world around them.