The Sea-To-Summit UltraSil? Nano Dry Sacks have been designed to save those crucial few grams. Using a 15D Sil/PU Nylon fabric called UltraSil? Nano, and pared-down components, Sea To Summit have created a dry sack 30% lighter than the already lightweight 30D UltraSil? Dry Sacks.

The Sea-To-Summit UltraSil? Nano Dry Sacks have been designed to save those crucial few grams. Using a 15D Sil/PU Nylon fabric called UltraSil? Nano, and pared-down components, Sea To Summit have created a dry sack 30% lighter than the already lightweight 30D UltraSil? Dry Sacks.