The yellow, 20 liter Pro-Sports Waterproof Backpack from OverBoard is a bag with a 1,200 cubic inch capacity that is designed to be able to float and keep its contents dry even when briefly submersed up to three feet. Utilizing a fold-seal closure that is secured with a snap-buckle, this bag features an IP66 rating and is suitable for use while on a boat, raft, or whenever there is an elevated risk of the wearer or their backpack falling into water. Alternatively, this bag can be closed using side buckles. Aside from providing protection from accidental immersion and the ability for later retrieval, the Pro-Sports Waterproof Backpack may also be used for instances where some exposure to water is anticipated, such as while crossing a stream or river.

To help ensure that this Pro-Sports Waterproof Backpack is comfortable to carry, its shoulder straps feature both padding and ventilation in addition to a ventilated back panel that further cools the wearer. An adjustable sternum strap as well as a waist strap provides additional stability and built-in lumbar support reduces pressure on the lower back.

Six external D-rings allow for direct and secure attachment of accessories while two mesh side pockets and an external mesh front pocket provide visible and easily accessible compartments. On top of the external mesh front pocket is webbing that can be tightened before being held in place with a snap buckle. A tarp, sleeping bag, sleeping pad, or coat can be easily and securely bound to the outside of the Pro-Sports Waterproof Backpack without the need to use valuable inside space. Inside the bag is a 9.8 x 8.3" pocket, suitable for items that require a higher level of security separate from those that simply need to be accessed quickly and conveniently.

Should the need arise to retrieve this bag under darkness or low-light; reflective external patches are included on the front surface and on both shoulder straps, and for emergency situations, the sternum strap features an emergency whistle buckle.

IP66 Waterproof Rating    Floats in Water    20 Liter Capacity    Padded Shoulder Straps, Waist Strap    Ventilated Back Panel and Straps    Sternum Strap with Whistle Buckle    External Front Pockets, Internal Pocket    External D-Rings, Quick-Release Webbing    Reflective External Patches    Top Carry Handle

Waterproof and submersible up to three feet

Floats if dropped in water

Contents are secured with a fold-seal and snap-buckles

Protects contents from water, dust, sand, and dirt

Padded shoulder straps and lumbar support for comfort

Ventilated back panel and shoulder straps help keep wearer cool

Adjustable sternum strap with emergency whistle buckle and waist strap for stability

Reflective patches to aid in location or retrieval under low light or darkness

Six external D-rings for optional attachments

Two external mesh side pockets, one zippered mesh front pocket

Internal pocket for additional organization

Front webbing with snap-buckle can fasten tarp, sleeping bag, or coat directly to bag

Top carry handle offers secure one-handed grip

Related Questions and Answers

Q: 1. What are the ID and OD?

A: id is interior dimensions and od outer dimensions this bag worked VERY well for me when I went up to within 580 of North Pole with it - a good product

Q: 2. what waterproof class is this bag? Is it class 1, 2, 3, 4, or 5?

A: According to their website this is Class 3 - IP66

Q: 3. How easy is it to get in and out of the bag with the camera?

A: Accessing the camera is easy, no snags or fiddling about.

Q: 4. Will this bag fit a nikon Df with the 200-500mm lens attached?

A: Yes. I use it for a D750 with the 200-500 lens. The Df body is slightly smaller than the D750, so it should fit just fine.

Q: 5. Can you use velcro dividers from another camera case to make compartments for cameras and accessories?

A: You could add the Tenba BYOB 10 DSLR Backpack Insert (Black), BH # TE636624 as a means of securing your camera while inside of the Overboard Classic Waterproof Backpack. https://bhpho.to/3NVEvgA

Q: 6. Looking to take sony a1 and a7IV cameras + Sony 100-400mm GM and 16-35mm lens onboard zodiacs. They recommend waterproof bags just in case the bags go overboard. Wondering if 20L will accomodate these or if I need to go with 30L?

A: I would go for the 30L. It would more comfortably fit both your camera bodies, both lenses and extra things like batteries, cables. filters etc.

Q: 7. What would be a good fit insert dividers for this?

A: Peak Design Travel Camera Cube (Large) BH #PEBCCLBK1 will work as an insert.

Q: 8. Does this bag have moveable foam compartments for cameras?

A: i'm sorry, no, the bag is empty.

Q: 9. I have a nikon 7100 with 500 mm lens, will it fit in this bag?

A: I use it with my Canon 5D MK III with a 300mm f2.8 L II with hood attached and ready to use. The combination is 45cm (17 3/4 )in length. The diameter of the lens hood is 14cm (5 1/2 . )I can easily roll the closing 3 or 4 times before fastening the clips so there is plenty of room for my needs.There is even room for padding, if needs be. I can, also, throw in a small waterproof bag that holds my CF card holder and some extra batteries. I will take it on its first kayak voyage in a couple of weeks. I took some photos with the combination inside the bag but I cannot upload them in this answer.

Q: 10. What is the interior configuration of this backpack? Does it have dividers similar to a typical camera storage bag?

A: The OverBoard Ultra-Light Pro-Sports Waterproof Backpack (Black, 30L) has one large main opening and a separate zippered compartment designed for keys, wallets, or other items. There are no other dividers inside the waterproof backpack.