As an AI language model, I don't have personal opinions, but I can suggest some popular options for men's online summer collection dresses. Here are some options that you may want to consider:

1. Short-sleeved button-up shirts in light colors and breathable fabrics like cotton or linen.
2. Polo shirts in bright colors or prints, made with lightweight and moisture-wicking fabrics.
3. Printed or patterned shorts in materials like cotton, linen, or chino fabric.
4. Lightweight linen or cotton trousers in light colors or prints.
5. Hawaiian or tropical print shirts in cotton or silk.
6. Cotton or linen blazers in light colors that can be dressed up or down.
7. Simple t-shirts in bright colors or graphic prints.

Remember to consider the fit, fabric, and style that best suits your preferences and body type, and make sure to check the sizing and return policies before purchasing.