How to Fit a Raincover on Your Backpack

By Kelty · Kelty | Published: 2026-10-18

Category: How-to Guides

Learn how to quickly fit a backpack raincover, choose the right size, and keep your gear dry in sudden storms with these practical steps.

Quick Answer

Choose a raincover that matches your pack's liter volume, then slip it over the top and secure the straps—this gives you reliable rain protection in under a minute.

Sizing matters more than you think

A raincover that's too small won't fully shield your pack, while one that's too large can flap in the wind and catch water. Match the cover to your pack's volume, not its height, because volume accounts for how much gear you carry and how the pack is shaped.

The Kelty Raincover comes in three sizes: medium for 30–50 liter packs, large for 55–75 liter packs, and XL for 80–105 liter packs. If your pack is between sizes, choose the larger cover for full coverage—it's better to have a little extra fabric than a gap at the bottom.

When a raincover isn't enough

A raincover protects the outside of your pack, but it won't keep your gear dry if water seeps through zippers or seams. For extended downpours, pair the cover with a pack liner or dry bags inside your pack to double up on rain protection.

Also, remember that covers can freeze or become stiff in cold weather. If you're hiking in freezing rain, check the straps periodically to ensure they haven't loosened.

Step-by-Step: Fitting Your Raincover

Confirm your pack's volume: Check your backpack's liter capacity (usually printed on a tag or the product page). If it falls between sizes, size up to the next cover size for full coverage. A cover that's too small leaves your pack exposed at the bottom.
Loosen the cover's straps: Before putting it on, release all compression straps and buckles on the cover so it can open fully. This prevents snagging on pack features like daisy chains or tool loops. Skipping this step can tear the cover or waste time in the rain.
Drape the cover over the top of your pack: Hold the cover by its center and pull it over the top of your pack, letting it fall down over the sides. Make sure the top opening aligns with the pack's top handle or lid. If it catches on a buckle, lift and reposition—don't yank.
Secure the straps: Clip the chest or waist straps (if present) and tighten any drawcords or side straps so the cover hugs the pack snugly. Adjust the bottom hem so it covers the pack's base completely. A loose cover flapping in the wind can abrade fabric and let rain in.
Test the fit before you hit the trail: Give the cover a gentle tug and check that it stays in place when you move. If it slides, re-tighten the straps. Practice at home so you can do it quickly in a storm. A dry run means you'll be ready when the rain starts.

Product Spotlight

Raincover: The Kelty Raincover is a lightweight, easy-to-stow waterproof cover available in medium (30–50L), large (55–75L), and XL (80–105L) sizes. It fits most hiking packs, so you can quickly deploy it when a storm hits without adding bulk to your setup.
Raincover