Amazon has the Under Armour Scrimmage Backpack 2.0 (several colors, 1342652-P) for $23 with free shipping on $25+ or with Prime. List price: $45. Features 16" shoulder drop, repels water, adjustable, padded HeatGear shoulder straps
holds up to 15" laptop, 2 zip-shut main compartments w/ 1 quick-stash pocket.

Has excellent Amazon Reviews.

$23 Shop Now

Amazon has the Under Armour Scrimmage Backpack 2.0 (several colors, 1342652-P) for $23 with free shipping on $25+ or with Prime. List price: $45. Features 16" shoulder drop, repels water, adjustable, padded HeatGear shoulder straps
holds up to 15" laptop, 2 zip-shut main compartments w/ 1 quick-stash pocket.

Has excellent Amazon Reviews.

$23

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eBay has the adidas Iconic Premium Backpack (black) for $40 - 20% off in cart = $32 with free shipping. This backpack is made with suede-like material that looks luxe while being super durable. The sleek design includes an inner pocket for your laptop plus an outer pocket for stowing small essentials. Thick, cushy shoulder straps make the bag comfortable to carry.

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Amazon has the adidas Linear Mini Backpack (Black, White or Onyx, 978253) for $15 with free shipping on $25+ or with Prime. One size, has a compact design. Has excellent Amazon Reviews.

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Amazon has the AmazonBasics Premium Backpack (Black, NC1504159R1) for $10 with free shipping on $25+ or with Prime. Fits most 15" laptops, has 26.6 liters capacity, front pocket organizer, front carabiner clip, and external water-bottle pouches.

Has excellent Amazon Reviews.

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