Regarding clothes, it all really depends on your style and what you are planning to do but a long sleeve shirt and long pants I believe are necessary
Above the emblem there appear the symbol of sanctity (the divided oval) and the hieroglyph which Professor Sayce interprets as the name of the god Sandes." In another instance "the centre of the winged emblem may be seen to be a rosette, with a curious spreading object below
Construction The shell of the K5 S is a fiberglass/carbon composite which accounts for the light weight and solid feel

Features SSL (Super Super Light) outer shell in fiberglass, Aramid and carbon in three shell sizes IVS (Integrated Ventilation System) with ample channels formed directly into the outer shell with air vents and rear extractors Dry-Comfort fabric with sanitizing treatment New skin-friendly fabrics improve comfort and reduce rubbing when putting the helmet on or taking the helmet off Completely removable and washable inner padding Features new 3D padding construction and a richer, more stylish internal padding design Race-X flat visor with anti-scratch and anti-fog lens Provides a wide field of vision and 100% UV protection Designed to be fitted with tear-offs (tear-offs not included) XQRS (Extra Quick Release System) allows for quick visor removal and replacement without tools New visor movement base is quieter and easier to use in the assembly and removal process Double-D retention system DOT and ECE22.05 certified WARNING: This product may contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm

Bearings: 4 BB
If you are in the market for a Bluetooth helmet but one that provides you with adequate protection, and is not too bulky to handle, then you definitely need the custom Bilt Techno Metropolis Bluetooth helmet