All leather face mask, colour matched head bands, Split lenses, bright polished and chrome plated frames, Sliding Nose Bridge Adjustment. The Mark 4 Silvercross is manufactured in the UK using a highly skilled workforce. solid brass frame is bright chromed and hand stitched to an all leather face mask. It has a sliding nose bridge that allows the goggle to be folded for storage. The lenses are made from a good quality polycarbonate that is treated with a scratch resistant coating to prevent damage to the surface. Each lens is housed in an independent frame that can be easily removed from the goggle to allow replacements to be fitted or to simple switch them with tinted lenses if the sun happens to be shining. Split Lens. Click Adjuster across Nose Bridge. Replacement polycarbonate lens available in clear and smoke. Halcyon Googles are manufactured in the UK and based on the original RAF flying goggle of the 1940's. Halcyon Goggles are a popular choice for use with all styles of open face helmets. Halcyon frames are made in the UK from brass. They are either chrome plated or painted in a variety of finishes and hand stitched to a one-piece padded leather or PVC face mask.