The Sea to Summit Hydraulic Pro Duffle Bag is fully-submersible and built for the toughest adventures you can take on! It's made from ultra-tough 100D high tenacity double-sided TPU-laminated fabric, with heavy-duty welded construction. Phew! That's some serious durability. The seams have been pressure-tested to meet the IPX8 standard - meaning you can submerge it up to 4 metres below the surface without issues. The form-fitting shoulder straps and extended foam back panels make it as comfy as possible, and stop the back strain from those sharp or awkward objects you might have packed. The bag has strength-tested grab-handles and daisy chains too, meaning you can feel confident when you're handling and lashing it. All with a great amount of storage space and a unique asymmetrical zipper which makes it super easy to pack and access your gear. An absolute must-have on those adventures where the elements turn against you and you have to tough it out.