When it comes to protecting sensitive photographic, video and audio gear from the trauma of bouncing around trains, planes and automobiles, it's hard to beat the protective qualities of nylon/polymer cases. HPRC, one of the better-known manufacturers of rugged nylon/polymer cases has just introduced a pair of impact-resistant shoulder cases small enough to qualify as carry-on baggage.
Made in Italy, both of these new shoulder cases meet ATA Spec 300 flight standards (recessed handles, non-corrosive hardware, rounded edges), are water- and dustproof (IP67 rating), as well as shock and extreme temperature resistant (STANAG 4280 / DS 81-41 standard). In a word: your gear is safe in these cases.
The smaller of the two new cases in the HPRC 4050, which has an internal measurement of 10.27 x 8.66 x 6.73" (261 x 220 x 171mm), an external measurement of 11.18 x 10.23 x 23.8" (284 x 260 x 223mm), and weighs 3.1 lb (1.6 kg) without the foam insert (HPRC4050E), and 7.95 lb (3.61 kg) with the cubed foam insert (HPRC4050F). There's also an HPRC 4050 available with soft dividers (HPRC4050DK).
HPRC 4050-series waterproof cases feature cushioned-grip handles, are stackable, and have an air pressure release valve for equalizing air pressure after high-altitude flights.
A bit roomier, but equally rugged and hand carryable on your next flight out of town is the HPRC 4100 (16.7 x 10.88 x 11.18" exterior, 15.8 x 9.09 x 9.09" interior). Like the HPRC4050-series cases, the HPRC 4100s are available without foam (HPRC4100E), with cubed foam (HPRC4100F) or soft dividers (HPRC4100DK).
Optionally available for both of these new shoulder cases is the "RBS" (Roll Body System) HPRC Padded Shoulder strap for those who prefer having both hands free when cutting paths through air terminals.