What factors to consider when purchasing a fully waterproof bag.

When choosing a fully waterproof bag, consider the following factors:

1. Waterproof Rating:

• IP Rating: Look for bags with a high IP rating, such as IP66 or higher. This indicates the bag's resistance to water and dust ingress.
• Seams: Ensure the seams are fully welded or taped to prevent water from seeping in.

2. Material:

• Durable and Waterproof: Choose a bag made from materials like PVC, TPU, or coated nylon that are resistant to water, abrasion, and punctures.
• Flexibility: Consider the bag's flexibility, especially if you need to pack it tightly or store it in a smaller space. Hard cases and bags provide good waterproofing but very poor or no flexibility.

3. Closure System:

• Reliable Seal: Opt for a closure system that creates a tight, watertight seal, very minimally a roll-top closure or buckle systems. Better is a fully waterproof zipper or press and seal closure system.
• Ease of Use: Ensure the closure is easy to operate, even when wet or in cold conditions. Roll top enclosures are easy, but typically afford less protection. Zippers and seals have more protection but may be harder to operate and more susceptible to failure.

4. Size and Capacity:

• Capacity: Choose a bag with the right capacity for your needs, considering the items you plan to carry. Smaller bags, typically less than 40 liters, can be airline overhead compliant and work well for shorter trips. Bigger bags in the 50-90 liter range and good for longer travel. Bags larger that 90 liters are typically specific use scenarios.
• Packability: If you need a compact bag, look for one that can be folded or compressed when empty. Look for bags that can be bled of air through a bleeder valve or zipper so you can compress the bag.

5. Comfort and Features:

• Straps and Back Panel: If you're choosing a backpack, look for comfortable, padded straps and a breathable back panel. Look for a bag that can be carried multiple ways - shoulder, handle or backpack.
• Additional Features: Consider features like external pockets, compression straps, or attachment points for additional gear.

6. Intended Use:

• Water Sports: If you're using the bag for water sports, look for a buoyant bag (air con be introduced) or a brighter color 
• Everyday Use: For everyday use consider a bag with design falling higher on the need list that water resistance.