This Rails Knox shirt in that gorgeous sunshine yellow is just what you need for those warmer days. It's cut with a relaxed, oversized fit, taking inspo from classic men's shirting but totally made for us. Think easygoing vibes. You'll love how light and airy it feels, thanks to the linen blend. It's one of those pieces you can just throw on with anything – tuck it into some denim shorts or wear it loose over a slip dress. Super comfy and breezy. Seriously, this shirt is a total staple for summer. Whether you're heading to the park or popping out for brunch, it just works. That butter yellow is subtle but still brings a bit of sunshine to your look.