Rain cover The provided elements cover will protect your valuable equipment during rainy and extremely dusty conditions. Simply install over the bag like a shower cap to protect your bag and gear. TST Rib The TST Rib provides discreetly structured protection, where it counts. Located on parts of the bag that are sensitive to shock, the TST Rib will protect your gear from bumps and any unwanted shock. On Board This bag complies with most airline regulations for carry-on luggage. Due to ever chan