Firefly 2022, hour six of nonstop rain, and I watched a girl next to me pull a soggy dollar bill out of her fanny pack like a magic trick nobody asked for. If your pack isn’t ready for weather, your phone, your cash, and your night are all on the line. Here’s how to build a waterproof fanny pack for festival weather without turning the fabric into something you don’t recognize.
TLDR
- Nylon and poly packs: hit them with a DWR spray (Nikwax TX.Direct or Grangers Performance Repel, about $15). Cheap, no stains, dries in a day.
- Canvas packs: wax them (Otter Wax or Fjallraven Greenland Wax). This darkens the fabric permanently, so test a hidden corner first.
- Seams are where you leak. Seam Grip WP or a Gear Aid seam sealer stick on the inside stitching is the real move.
- Lazy insurance: a gallon ziploc or a small dry bag stuffed inside. Ugly. Works every time.
- Skip: Scotchgard on technical fabrics, silicone spray on canvas, and anything labeled “waterproofing” at the dollar store.
First, figure out what your pack is actually made of
Before you spray or wax anything, flip the pack over and read the tag. Most festival packs (ours included) are nylon or polyester with a light factory DWR that wears off after a season of sweat, sunscreen, and drink spills.
Canvas is different. Canvas soaks water up and holds onto it, so a spray won’t do much. It needs wax.
Coated packs (TPU or PVC-lined) are basically already water-resistant out of the box. On those, you’re really just sealing the seams and the zipper. If you’re shopping for a new one, the fanny pack collection has both nylon and coated options, and the material is listed on every product page.
The DWR spray method (best for nylon and poly)
This is the easiest one and it’s what I do to my nylon packs every spring before festival season kicks off.
Wash the pack first. Dirt and body oil block the coating from bonding, so a soapy sponge and cold water rinse (no detergent with fabric softener) makes a real difference. Let it dry fully.
Then grab Nikwax TX.Direct Spray-On or Grangers Performance Repel Plus. Both run around $15 at REI or on Amazon. Take the pack outside, hold the can about 6 inches away, and do even coats until the fabric looks uniformly damp. Wipe off the excess with a clean rag so you don’t get streaks. Air dry 24 hours.
Reapply every few festivals or after any real washout. You won’t see a color change or feel a texture change, so this is safe for printed and patterned packs.
Waxing a canvas fanny pack (the permanent-ish option)
If you’ve got a canvas pack (Carhartt-style, vintage vibe, thrifted from a booth at Bonnaroo), wax is your play.
Otter Wax comes in a bar. Fjallraven Greenland Wax is basically the same idea. Rub it directly onto the fabric, then hit it with a hairdryer on high until the wax melts into the weave. You’ll watch the canvas darken as it absorbs.
Two things to know:
- It darkens the canvas permanently. A tan pack turns olive-brown. Test a bottom corner first if you care.
- Two thin coats beats one thick one. Thick wax stays tacky and picks up every bit of dust and glitter you walk past.
Skip the wax move if your canvas pack has screen-printed graphics. The hairdryer heat can lift the print.
Seal the seams (this is where every pack leaks)
Real talk: water finds the stitching before it finds the fabric. You can spray a pack ten times and still get a wet phone if the seams aren’t sealed.
Turn the pack inside out. Run Seam Grip WP or a Gear Aid Seam Sealer stick along every interior seam, especially the corners and where the strap attaches. Let it cure overnight. If you rush it, it stays sticky and grabs onto your stuff.
Zipper trick: if your pack doesn’t have a waterproof zipper (most don’t), lay a strip of clear packing tape along the inside of the zipper tape. Sounds janky. Works.
This is the step people skip. Then they blame the DWR spray when their ID comes out translucent.
The lazy hack: dry-bag liner
Okay so, sometimes you don’t have an afternoon. Sometimes it’s 20 minutes to gates, the sky looks mean, and Target closed at 10.
Sea to Summit makes an Ultra-Sil 1L dry sack that fits inside most fanny packs and costs about $13. Roll the top, clip it, done. Or grab a gallon ziploc from a gas station and call it a day.
Phone, cash, ID, meds, anything that dies when it gets wet goes in the liner. Sunglasses, gum, hand sanitizer, chapstick can live outside.
This is what I actually do at Bonnaroo when the forecast is a coin flip. No chemistry, no wait time. Pair it with the DWR spray you did back in April for a real washout day (Firefly, Bonnaroo, Electric Forest, take your pick, they’ve all handed me a soaked outfit). The accessories page has some other pack-inside-your-pack options if you want to browse.
What to skip so you don’t wreck the pack you love
- Scotchgard on technical nylon. Leaves a chalky residue that can flake off after a few uses. It’s made for upholstery, not performance fabric.
- Silicone spray on canvas. Turns it into a weird stiff plastic-feeling thing that won’t breathe.
- Beeswax rubbed straight on nylon. Doesn’t bond. Gets sticky. Collects glitter and lint until your pack looks fuzzy.
- Dollar store “waterproofing” sprays. No brand, no ingredients list, no thanks.
- Machine washing a pack you’ve already waxed. Wax plus hot water equals a ruined washer drum and a call to your landlord.
One more rave-mom note
Weatherproof your pack the week before you leave, not the morning of. Seam sealer needs a full night to cure. Wax needs a day for the surface to stop being tacky. DWR spray needs 24 hours to bond. If you spray Friday morning and pack Friday afternoon, you’ve mostly just wasted $15.
Also, if your phone lives in your pack, keep it in a ziploc even after all this. Water resistance ratings on phones are not a promise, they’re a suggestion, and Tennessee humidity has opinions.
Pick your fighter
An afternoon of prep saves your phone, your cash, and your mood on the festival day the forecast lied about. If your current pack is on its last legs and no amount of DWR is bringing it back, we build ours to hold up to actual festival abuse. Go poke around the fanny packs and pick your next one.
See you in the crowd. Bring the dry bag anyway.
Maya, Sojourner Festival Editor Maya has been to more festivals than she can count and has the calluses, the glitter stains, and the strong opinions to prove it. She writes about everything from EDC to small DIY raves in Brooklyn warehouses.
