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The SealLine Sleep System Compression Sack is one of the most advanced compression sacks available. This compression sack serves double duty in the field being both a high performance compression sack as well as completely waterproof. There may be no more important factor in a successful overnight hike than dry sleeping arrangements and this USMC waterproof compression sack will help ensure your sleep gear stays dry no matter how torrential the rain gets.
While most waterproof compression sacks just use trilaminate materials for water resistance the SealLine compression sack is different. The materials used to construct the compression sack are water resistant but there are additional enhancements for performance. The two black striped lines act as a double water tight seal for the top of the compression sack keeping everything inside nice and dry. There is an air purge valve on the side of the compression sack that once you put pressure on the sack will force out air inside the sack. This results in tighter compression for a smaller profile and enhanced waterproof performance that few if any compression sacks can compete with.