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PHOTOCHROMIC TECHNOLOGY: Intelligent lens cycling sunglasses automatically lightens or darkens in response to changing light conditions without needing to switch between glasses. Frameless construction giving you more clear peripheral vision to avoid the frame blocking your view LIGHTWEIGHT: Only 30g/pair, great to wear for long periods of time. Ultralight cycling sunglasses reduce the pressure on your nose and temples SAFETY: Thicken PC lenses with UV400 protection coating, shatterproof and scratch-resistant effectively, protecting your eyes from any debris, UV rays and other harmful light COMFORTABLE: Adjustable soft rubber nose bridge can easily find the right angle for you and ensure the sunglasses doesn't slide off your face when playing golf MULTI-PURPOSE: ROCKBROS photochromic glasses can be used for multiple activities, such as golf, cycling, driving, fishing, skiing, runing, tennis, racing and other outdoor sports UPC 335782725866 Brand ROCKBROS Color Matte Black Pattern Solid Fit Type Good Material Polycarbonate, Rubber Lens Type Photochromic Item Shape Rectangular Lens Color Clear Sport Type Outdoor Lifestyle, Road Cycling Style Name Casual Unit Count 170 Grams Item Weight 30 Grams Manufacturer ROCKBROS Style Number 10139-US Occasion Type cycling, driving, fishing, golf, runing Item Type Name Glasses Collection Name Outdoor Sports Safety Glasses Polarization Type Non-Polarized Lens Material Type Photochromic Frame Material Type sunglasses Included Components Not have components Age Range Description Adult Fit to Size Sentiment Positive Apparel Fabric Stretch No Stretch Lens Coating Description UV Protection Coating, Scratch Resistant Coating Manufacturer Part Number 10139-US Product Care Instructions Clean lenses with a soft cloth. Avoid high heat. Store in the provided case when not in use. Apparel Fabric Weight Class Lightweight Ultraviolet Light Protection 400 Manufacturer Warranty Description one-year warranty