UV Protection: "The most important factor is ensuring they offer UV protection to protect the eyes from harmful sun rays," says Mihir Trivedi, the Head of Marketing of Nikon Lenswear. Therefore, choosing sunglasses that provide 100% UV protection—against both UVA and UVB—is important. "Select lenses that are appropriate for your lifestyle and daily activities," Trivedi adds. "Polarized lenses are great for water sports and outdoor activities, while photochromic lenses are better for everyday use."

Polarization: "Polarized lenses are designed to reduce glare and improve visual comfort, making them an excellent choice for outdoor activities," says optometrist Amman Anup Kumar. By reducing glare, it also reduces strain and damage to your eyes. Adding polarised lenses will thus enhance your outdoor experience and are recommended for people who enjoy the outdoors. Polarized sunglasses will also help reduce glare from surfaces like water, snow, and pavement, not just from the sun.

Face Shape: "When shopping for sunglasses, consider your face shape," says Anna MacGabhann from eyewear retailer SmartBuyGlasses. "While our looks are unique, our face generally falls into one of four face shapes: round, oval, square, or heart." Knowing your face shape and what eyewear style goes well with it is a great way to begin refining your options when searching sunglass for men. We'll break down this more below, but as a rule of thumb, go for frames that oppose your features.

Fit: It is essential when investing in a pair of sunglasses to have the correct fit. Sunglasses should fit comfortably on your nose and face without causing any pressure points or slipping off. If you struggle to find the best nose fit, adjustable nose pads or temples are the best option for your comfort. If you have a wider set head and find that glasses are always too tight, a spring-hinged pair is perfect for you.

Type/Style: "The type and shape of the frames can play a significant role in enhancing facial features and creating a cohesive look with other accessories and clothing," says Trivedi. Overall, the sunglasses you choose should complement your face shape, personal style, and the occasion for which they will be worn. There are various types and styles of sunglasses: aviator, wayfarer, round, square, sports sunglasses, etc.