MATEIN 27L Waterproof Expandable Travel Backpack Carry On

• Amazon now offers the MATEIN 27L Water-Resistant Travel Backpack for $20.39 (list price $65.99).
• Prime members get free two-day shipping, and regular members get free shipping on orders over $35 within the contiguous U.S.
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Editor's Pick: For a two or three day weekend trip, this bag fits as a carry-on without needing to check it. It stays at carry-on size when packed normally, and when you have more stuff, just unzip the expansion to gain extra capacity—enough for a few changes of clothes plus a toiletry bag. The straps tuck into the back to convert it into a handbag, so it's easy to carry when you're rushing for a flight.