Earlier this month (October 2) we celebrated National Denim Day by wearing nothing but clothes made of denim (even denim underwear, which you’ll find below). For Lee Jeans, who started the national day of celebration in 1996, it’s a day to raise money for breast cancer research, but for us it’s also a day to do denim research and discover things that we didn’t know the fabric was capable of. We’re taking this time to report some our findings in this listicle of 12 Obscure Denim Inventions.

Denim Helmet

All-Denim Family

Denim Face Mask

Looks a lot like a BDSM mask.

Denim Body Suit

That’s hot.

Denim Bikini Pants

Denim iPhone Case

Kid Denim Suit

Coolest kid ever? Possibly.

Denim Shoes

Those don’t look very waterproof.

Justin Timberlake and Britney Spears in Denim

Still a classic.

Vintage Bell-bottom Denim Suit

That one never gets old.

Denim Underwear

That’s some scandalous denim.

Denim Wedding Dress

We wonder what the groom wore.