These plastic, workable-sized storage boxes are designed to fit on your roof rack or can be easily arranged in a vehicle’s cargo bed. They are vertical-sided to avoid wasted space and stack securely thanks to an innovative nesting design. Stackable - Wolf Pack Pros have been designed to maximize storage space in your garage, attic, or storage cupboard thanks to the way they conveniently and securely stack on top of each other. These load boxes feature an ingenious ‘nesting’ design which means the top box fits snugly into the lid of the box below. Water Dust Resistant - Sealed securely shut with strong (but easy-to-use) latches you can rest easy that any items such as seasonal clothes, sneakers, or children’s toys stored in these heavy-duty storage bins will remain moisture, dust, and insect free. Impact-Resistant Plastic - Wolf Pack Pros are made from impact-resistant plastic making them ultra-durable. They have been tested in the most extreme expedition conditions so when used at home you can have complete peace of mind that your stored items are secure and the load box will last. Suitable for exterior storage - Trusted by overland drivers around the world, these heavy-duty storage bins can be used to store valuable items at home whether indoors or outside, keeping them dry and dust-free. Versatile - Store anything from seasonal clothes, shoes, and sneakers to kitchen items and children’s toys to tools and camping gear in these versatile load bins. You also have the option of making extra room in your Wolf Pack Pros with the Wolf Pack Pro Hi-Lid. It adds 2.3''/ 60mm of height which allows you to organize and transport bulkier gear. Wolf Pack Pros form the heart of many Front Runner storage systems. The Front Runner Transit Bags hold 2-3 Wolf Pack Pros depending on Transit Bag size and Wolf Pack configuration. Front Runner Wolf Pack Drawer Systems provide comprehensive and practical vehicle storage solutions. For a padded storage solution, line the Wolf Pack Pro with a SBOX027 or SBOX052 to protect camera gear, kitchenware and other fragile items. Use in conjunction with Wolf Pack Pro Rack Mounting Brackets or STRA034 as well as RRAC012 for a safe and secure roof rack storage solutions. Wolf Pack Pro's are not stackable with Wolf Pack. PLEASE NOTE:Due to varying internal air pressure, the lid of the Wolf Pack Pro may occasionally prove difficult to open due to its sealing ability. To open, apply moderate pressure to the lid with one hand directly next to the latch, checking the latch is properly closed before unlatching. To view a demonstration, please view video in the videos tab above.