Welcome to the forum and congrats on your purchase!
The only advice about the Velcro that I can offer is that the scratchy hook side will attach to strings & other material besides the "receiver" side. The soft fuzzy receiver side will not.
Just guessing, I'd go with the "outdoor" type.
Deb & Gary
2007 Ford E150 cargo van, 2012 Rockwood Premier A126
Everybody needs beauty as well as bread, places to play in and pray in, where Nature may heal and cheer and give strength to body and soul alike._ John Muir