Sea to Summit Lightweight Dry Bag

The Sea to Summit Lightweight Dry Bag is a roll-top dry bag in 70D nylon rated to a 10,000 mm hydrostatic head, a solid rating for splash, rain and general wetting in a pack. It comes in seven sizes from 1.5 to 35 L, weighing between 34 and 115 g depending on size — the 8 L version shown here weighs 67 g, in the light-to-mid range of the lineup. The interior fabric is white rather than the more common black or clear, which sounds like a small detail but matters in practice: digging through a dark-lined sack at dusk is slower than one where contents are visible at a glance. That, combined with the range of sizes, suits organising a pack by category rather than just keeping gear dry. As a roll-top rather than a fully welded submersible bag, it suits pack organisation and rain protection on trail more than whitewater paddling or full water crossings, where a dedicated submersible dry bag is the safer choice.