Many applications for dry bags don't require the traditional heavy rubberized bags designed for hardcore marine use. The Sea to Summit Lightweight Dry Sacks offer a less expensive and less bulky alternative to traditional dry bags. You can squash these into spots ordinary heavy dry bags won’t go. Fits into little corners of a sea kayak or light enough to take backpacking or adventure traveling. Suitable to keep contents dry in any wet situation where the bag is not submerged. Designed specifically for backpacking, adventure travel and water sports the Lightweight Dry Sacks are made from a high performance waterproof fabric. They feature a bright white inner laminate for easy visibility of contents that work their way to the bottom of the bag. Fully tape sealed seams, a non-wicking Hypalon-stiffened roll-top closure, low profile buckles and D-ring attachment point at the buckle are extra features that make these bags stand out from all the rest. Bags with "flat" in the dimensions have a flat bottom design. Bags with a "dia" in the dimensions feature a round-bottom design. Not intended for complete submersion.