Strongbags Luggage Vortex 21 Flight Crew Luggage Black Inline skate wheels with sealed bearings for a smooth effortless ride. 100% Dupont Nylon Wheel wells - ultra strong and impact resistant. Waterproof material - 2120D Cordura Ballistic Nylon manufactured by Invista. This material is more tear and abrasive resistant than just ordinary ballistic nylon. Fits nicely in the 737 cockpit (including '300 & '500 models) Strong stainless steel handle with comfortable rubber grip.