When a waterproof pack cover is this light (3 ounces), bringing it along is no hassle at all. It even comes with its own stuff sack.

• Made of 30D Diamond Ripstop Sil Cordura silicone-impregnated, waterproof finish can't peel or wear off over time
• "No-seam" construction provides complete waterproofness
• Keeper strap helps secure it to the pack and prevents the sides from catching wind as you hike
• Mini-siliconized nylon stuff sack remains attached to the cover so it won't get lost
• Fits packs 1,800-3,000 cu. in. (30-50 liters)