- Slip into the Portia Shirt and embrace effortless style. This relaxed number features a laid-back open collar with button stand, paired with cuffed sleeves that sport a cheeky button tab detail. Dual chest pockets keep your essentials close, while contrast topstitching adds a playful pop of personality. Crafted from a breathable blend of cotton, linen, and contrast fabric, it's the perfect companion for warm days and good vibes.