Kata KT DT-213 Digital Torso-Pack Rain cover - The provided elements cover will protect your valuable equipment during rainy and extremely dusty conditions. TST Rib - The TST Rib provides discreetly structured protection, where it counts. On Board - This bag complies with most airline regulations for carry-on luggage. Due to ever changing carry-on requirements Shoulder Strap  Ergonomic, so it fits your exact shoulder grade for optimal carrying angle. EPH System Compatible - This bag is compatible with the Kata EPH system which will allow you to connect additional bags. Located on parts of the bag that are sensitive to shock, the TST Rib will protect your gear from bumps and any unwanted shock.