Quick answer

Snap the Pack Jacket onto your Gossamer Gear backpack before rain starts, then tighten the drawcords for a snug fit that keeps your gear dry on the trail.

Why a pack jacket beats a loose rain cover

A pack jacket is designed to fit specific backpack models, so it doesn’t flap or shift in wind like a generic rain cover. The silicone-coated nylon sheds water while the UTS backing adds durability, which means you can rely on it through brush and rocky sections without worrying about tears.

This cover is made for Gossamer Gear’s framed Mariposa 60 and Gorilla 50, plus the frameless G4-20. If you carry a different pack, check the fit before relying on it in a downpour.

Steps to fit your pack jacket

  1. Attach the snaps: Lay the Pack Jacket over your loaded backpack and snap it onto the pack’s attachment points. Make sure the cover is centered so it covers the top, sides, and bottom evenly. Check that all snaps are secured before you start hiking.
  2. Tighten the drawcords: Pull the drawcords snug around the pack to eliminate loose fabric. A tight fit reduces flapping in wind and prevents water from pooling in gaps. Re-tighten after a few minutes of walking, as straps can settle.
  3. Secure loose straps: Tuck or buckle any dangling backpack straps under the cover. This stops them from catching on branches and keeps the cover from shifting. Double-check hip belt and shoulder straps are accessible for when you take the pack off.
  4. Test in light rain: Before a long trip, wear the covered pack in a light shower to confirm the fit. Adjust the drawcords if water runs inside at the top opening. If water enters, tighten the top drawcord more or reposition the cover.
  5. Dry before storing: After hiking in rain, remove the Pack Jacket and let it air dry completely. Store it loosely to prevent mildew and keep the coating effective. Never pack it away wet—dry it out at camp or at home.

Product facts

  • Pack Jacket: Made from 20D recycled nylon mini ripstop with a silicone face coating and durable UTS backing, and it snaps onto Mariposa 60, Gorilla 50, or G4-20 packs. This material resists abrasion and rain, so the cover holds up on rugged trails while keeping your pack contents dry.

    Pack Jacket

    Pack Jacket