How to Choose a Pack Cover for Hiking in Rain
By Sea to Summit | Outdoor Gear To Equip & Inspire | Published: 2026-10-21
Category: Buying Guides
Learn how to pick the right backpack rain cover for hiking. We cover sizing, weight, waterproofing, and trade-offs to help you stay dry on the trail.
Quick answer
Choose a pack cover that matches your pack volume, weighs as little as possible for your trip, and is fully waterproof. For most day hikes, a lightweight silicone-coated nylon cover is ideal; for multi-day trips, prioritize durability and a secure fit.
Why weight matters for a pack cover
Every ounce counts when you're hiking, and a pack cover is no exception. A heavy cover adds unnecessary bulk and can make your pack feel unbalanced. Ultralight options, like those made from 30D Ultra-Sil fabric, weigh under four ounces for a medium size and pack into their own stuff sack, making them easy to stash until needed.
Trade-off: Ultralight fabrics are less abrasion-resistant than heavier denier materials. If you frequently bushwhack or scramble over rocks, a slightly heavier cover may last longer.
Waterproofing and seam construction
Not all pack covers are equally waterproof. Look for covers made from coated nylon or silicone-impregnated fabrics that are inherently waterproof, not just water-resistant. Some covers use seam-sealed construction to prevent water from seeping through stitch holes.
A notable design choice: some covers avoid seams altogether to eliminate leak points. For example, the Ultra-Sil Pack Cover does not use seam construction, which ensures there are no weak spots for water to enter. This is a smart approach for reliable rain protection.
Decision rules for choosing a pack cover
- Match cover size to pack volume: Pack covers are sized by pack volume in liters. Measure your pack's main compartment capacity (not including external pockets) and choose a cover that fits snugly. A cover that is too large will flap in the wind and may come off; one that is too small won't cover the top or bottom. Check your pack's volume before buying. Most brands list a size range (e.g., 30-50L) on the cover.
- Prioritize weight for your trip type: For day hikes and fast-and-light trips, an ultralight cover (under 4 oz) is ideal. For multi-day treks where you carry more gear and may encounter rough terrain, a slightly heavier cover with reinforced fabric offers better longevity. If you're an ultralight backpacker, look for a cover that packs into its own stuff sack to save space.
- Check for secure attachment: A good pack cover should have a drawcord closure, elastic hem, or clips that attach to your pack's compression straps. This prevents the cover from slipping off during wind or when you take your pack on and off. Test the fit with your pack loaded—covers can shift when the pack is full.
Product facts
- Ultra-Sil Pack Cover: Made of 30D Ultra-Sil™ fabric constructed from CORDURA® yarns for durable, waterproof performance. This pack cover does not use seam construction to ensure that it is completely waterproof. The lack of seams eliminates common leak points, and the lightweight fabric keeps your pack light—ideal for hikers who want reliable rain protection without extra weight.
Ultra-Sil Pack Cover
Who this is for
Best for
- Day hikers who want a lightweight, packable cover for occasional rain
- Ultralight backpackers who prioritize minimal weight and volume
Not for
- Heavy-duty expeditions where abrasion resistance is critical—consider a heavier-duty cover or a pack liner instead
