The Bel-Air Boys Long Sleeve Shirt in Navy is a versatile everyday top that works as easily for school-run mornings as for smarter family occasions. If you're searching for a designer boys' long sleeve shirt that's easy to style, navy is a dependable choice — it layers cleanly under jumpers and pairs with everything from shorts to chinos. Available in sizes 3 to 14 years, it suits younger children through to teens.

Buying advice

• Layering: A long sleeve navy shirt sits well under a jumper or jacket in cooler months, and works on its own in milder weather — a practical year-round option.
• Fit: Check the size guide for sleeve and chest; if your child is between sizes or you want room to layer underneath, sizing up helps.
• Care: Iron on the reverse to keep the finish neat and check the sewn-in label for wash temperature; hanging after washing reduces creasing.
• Styling: Wear untucked with shorts for casual days, or tucked into chinos with smart shoes for occasions and family gatherings.