Randolph Engineering Aviator Bright Chrome Sunglasses | Blue Flash Mirror Bayonet Size:55MM Resonance Frequency: 90 Hz

Resonance Frequency: 90 Hz

Pair with your Suunto heart rate monitor or compatible gym equipment

Weight: 12 oz | 340 g

Exterior: Extremely durable 1000 Denier Nylon exterior

Lining: Soft yellow brushed tricot

Randolph Engineering Aviator Bright Chrome Sunglasses | Blue Flash Mirror Bayonet Size:55MM Resonance Frequency: 90 HzRandolph Engineering originally built their classic Aviator for the U. S. Military, surpassing rigid mil spec standards. As a standard issue since 1982, these Bright Chrome Aviator Sunglasses are battle tested and ready to take on the most rigorous and demanding use. Whether you're a pilot, taste maker, or just someone that demands the best quality, you won't be disappointed. [Details] Made in USA using the finest components found worldwide. Signature