You can't let water sit on the floors. If they get wet wipe up immediately. That's according to the directions. That being said we haven't had any issues yet (about 1 year w/them) with any water spillage. They are cleanable w/the proper cleaner solution (https://www.homedepot.com/p/Bona-128-oz-Hardwood-Cleaner-WM700018159/202528507).
Designed in USA, currently produced in People's Republic of China.
It's engineered hardwood. Top 2-3 mm is real wood, underneath is locking engineered wood layer. Have not installed it, but have the sample. It is beautiful if you like light color and maple stranding. Order a sample, it will get to you within a few weeks.
As indicated in the description, they are 5 in. x 7 in.
400 square feet worth.