The Treelines feature polarized lenses that reduce glare and enhance clarity—especially useful in exposed environments, such as snowy landscapes, alpine trails and open water.

The frames are made from Sunski’s SuperLight recycled resin—an ultra-durable, flexible, and featherlight material crafted from post-industrial waste plastic. It’s designed to be tough enough for rugged use while reducing environmental impact and reusing plastic otherwise destined for landfill.

When winning their Red Dot Design Award, the jury specifically called out the highly functional protection offered by the Treeline's magnetic side shields. These perforated shields protect the eyes from sun, wind, and debris, while their ventilated design prevents fogging and allows airflow during high-output activity.

With a medium fit, the Treeline measures 141 mm across the temples, 10 mm at the bridge, and 51 mm in lens width. Despite the full-coverage protection, they weigh just 28 grams, making them comfortable for all-day wear.

The lenses feature 11% visible light transmission (VLT), making them ideal for bright, sunny conditions where eye protection and reduced glare are essential. It provides excellent contrast and depth perception without over-darkening your view.

All lenses block 100% of UVA, UVB, and UV400 rays and meet FDA basic impact test standards for added safety in dynamic environments.

Backed by a lifetime warranty against manufacturing defects, Sunski stand behind the Treelines as a reliable choice for serious outdoor pursuits with a sustainable edge.

SHIPPING OPTIONS

We offer free standard delivery (Tracked 48) on orders over £90.

Royal Mail Tracked 48 (2-3 business days): £2.95

Royal Mail Tracked 24 (usually delivered next business day if ordered by 2pm the business day before, but not 100% guaranteed): £5.95

N.B. For bladed products a £2 surcharge is added to normal shipping costs, to cover the legally required age verification service, provided by Royal Mail

Royal Mail Next Day by 1pm (guaranteed delivery by 1pm next business day, if ordered by 2pm the business day before. Not available on bladed products): £12.95

For some rural postcodes next day delivery is not possible. For more detail on these postcodes, please see our Shipping page. There is no system check for these postcodes, so please do not select these services if your delivery address falls within this list.


RETURNS

We offer 100-day returns, provided items are returned in a perfectly re-sellable condition (undamaged and in original condition with tags/packaging). For more detailed information on conditions of return and the process involved, please see our Returns policy page.