Start by defining your needs:

• K341-PH-RE-01 or K2-PH-BL-1L-01 are ideal – they adjust to changing light conditions.
  
• K76-G-1L-21 or K153-G-1L-06 offer both function and versatility.
  
• K237-PCPG-01 or mirrored lenses such as K242-GFW-01.

Each model code breaks down as follows:

• Kxxx – model number

• G, PH, PCPG, GFW – lens type:

• G – standard lenses

• PH – photochromic lenses (adjust to sunlight)

• PCPG – polycarbonate lenses with anti-fog coating

• GFW – mirrored lenses (Gold Flash or similar)

• RE, BL – additional designations:

• RE – possibly Red Enhanced or reflective coating

• BL – likely Blue Light filter or Blue Mirror

• 1L – one-lens frame

• Numbers like 01, 06, 11 – lens color code

Photochromic lenses (e.g., in K341-PH-RE-03, K2-PH-RE-1L-11) adjust their tint based on sunlight intensity. They’re perfect for athletes training at different times of day, in varying conditions, or for those who don’t want to constantly change eyewear.

Yes. Models like K237-PCPG-09 and K237-PCPG-01 feature polycarbonate lenses with a special anti-fog treatment – great for high humidity or early morning runs.

Mirrored lenses (e.g., K242-GFW-04) don’t necessarily increase UV protection but help reduce glare in bright environments such as water, sand, or snow.

If you have a known sensitivity to polycarbonate material or are undergoing specific eye treatments, consult your ophthalmologist. All models offer UV400 protection and are safe for sports use under normal conditions.

Use a microfiber cloth. Avoid harsh chemicals. Store glasses in their case to protect the lens coating. Photochromic and mirrored lenses especially require gentle cleaning to maintain functionality.