The Sea to Summit Ultra Sil Duffle Bag. The new Sea to Summit Ultra-Sil Duffle Bag is the ultimate in lightweight bags. With an incredible volume capacity of 10.5 gallons and strong enough for a heavy load, it is the perfect bag as an airline carry-on, for impromptu excursions or just going to the gym. Super compact and super light, it is an obvious choice as a spare bag on any trip.
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