The t-shirt, our most tried-and-true warm weather staple, will get an upgrade this spring. Look for the new and improved versions to feature unexpected flourishes, demure cut-outs, asymmetric and cropped silhouettes--and yet remain as versatile as ever. My favorites include this one-shouldered Rosetta Getty, this tie-trimmed JW Anderson, this cut-out Whistles, this knotted Stateside, this slit-sleeved Mango, this scalloped See by Chloe, this pleated back Sacai, this frayed Acne Studios and this ruffle-accented Rag & Bone.