Pelican Products has introduced four  ProGear Sport Backpacks that include a built-in hard case or rigid compartment for electronics and other valuables.

The integrated crush-resistant Pelican case in the Elite models includes a watertight o-ring seal—with automatic pressure equalization valve—and is designed to protect laptops, MacBook computers, netbooks, e-readers, tablets, keyboards, and other accessories. Four adhesive, memory foam buffers help secure the laptop or tablet for safe travel.

Pelican ProGear Sport Backpack models include:

• The  S100 Elite Laptop Backpack  protects 15- and 17-inch Apple or PC laptops with a built-in, watertight, crushproof Pelican case. The S100 Elite Laptop Backpack also features bottom-expanding sling storage and a top-loading TSA-ready main storage compartment. Other features include a rigid front plate and ergonomic ventilated back panel for tablet device protection. It retails for $269.95.

• The  S140 Elite Tablet Backpack's  watertight and crushproof Pelican case safeguards tablets, notebooks, and small netbooks, while also fitting most tablet keyboards. It also features a rigid front plate, ergonomic ventilated back panel and SureGrip soft rubber handle. Additional features include a top-loading TSA-ready main storage compartment as well as a padded lumbar storage cavity. It retails for $239.95.

• The  S105 Laptop Backpack  shields 15- and 17-inch Apple or PC laptops with an impact-protective frame. Additional features include a rigid front plate, integrated laptop sleeve, and ergonomic design with deep-ventilated channel back panel. It retails for $139.95.

• The  S145 Tablet Backpack  includes an impact-protected tablet sleeve with a rigid front plate that offers an additional storage option to the 21-liter main storage unit. The S145 also features an ergonomic, fast-access, top-load design with deep-ventilated channel back panel. It retails for $109.95.

The ProGear Sport Backpacks are offered in black, orange, and green. The material is light rip-stop nylon. The slimmer case design favors Ultrabooks.