Here's what other sites are saying:
Turn your NRS dry bag into a soft cooler with the Cool Liner! Reflective Mylar(R) and closed-cell foam - just add ice.These liners fit inside small, medium, large and X-large NRS Ricksacks, Tuff Sacks, Super Tuff Sacks, Round Bottom Sea-Stows and Dri-Stow dry bags.Same reflective Mylar(R) and closed-cell insulation as the NRS DuraSoft Coolers, for great cold retention.Come with a closed-cell foam lid, to seal in the cold.Perfect for the beach, picnic, concert or day trip. Heck, you've already got the dry bag. Slide in the Cool Liner, add your ice, beverages and food. Fold the bag closure down, clip it in place and you're ready to go.They're not watertight; but, hey - the bag is waterproof, so no outside leakage occurs.Fool your friends - "Naw, it's only my clothes. That sloshing sound? Just my mouthwash."
Where to Buy
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NRS Ricksack Dry Bag
Sea to Summit Ultra-Sil Dry Sacks
$13 - $15
Granite Gear DrySack
$12 - $27
Outdoor Research Durable Dry Sacks
$30 - $38
Outdoor Research Ultralight Dry Sacks
Outdoor Research Graphic Dry Sack
$18 - $27