It’s a protective lens wrap that looks like just like a burrito! Here’s how it works: wrap your lens up burrito-style in the padded sleeve, and a built-in band will hug your lens to keep it in place. The wrap does the cushioning for you, so you can toss your lens into *any* bag. The wrap itself is made of super-tough Tyvek (the stuff hazmat suits are made of!) and cushioned with neoprene.