Lace garments help you stay cool, and palazzo pants are often worn in warm weather. Combine them and you have perfect semi-formal summer wear. These types of pants are usually loose and wide-legged. The fabric is often doubled, so that while they retain the sheer, see-through look, they in fact don’t show your legs. White and black are most popular for these types of pants, but they are available in many other colors.
Two very flow-y and breezy examples. I like these:
Lace palazzo pants pictured:
Left: Anna-Kaci S/M Fit Crochet Floral Lace Overlay Palazzo Wide Leg Style Pants, beige
Right: Brinley Co. Womens Lace Palazzo Pants, black
Palazzo pants are not just very wide at the leg, they are also very long. This means that whatever you wear on your feet is likely to be hidden. So your footwear is not as important a part of your outfit as it would be if you were wearing shorter trousers.