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, 22 mm at the bridge, and 50 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

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

DPD Next Business Day (Cut off: 2pm Mon-Fri): £5.95

DPD Next Business Day by 12 Midday (Cut off: 2pm Mon-Fri): £12.95

DPD Saturday Delivery (Cut-off: Fri 2pm): £9.95

DPD Saturday Delivery by 12 Midday (Cut off: Fri 2pm): £12.95

DPD Sunday Delivery (Cut-off: Fri 2pm): £9.95

18+ PRODUCTS

18+ Standard - Royal Mail Tracked 48 + Age Verified (2-3 business days): £4.95

18+ Express - Royal Mail Tracked 24 + Age Verified (Usually next business day but not guaranteed, cut-off 2pm Mon-Fri): £7.95

FREE SHIPPING

FREE Royal Mail Tracked 48 (2-3 Business Days): Orders £90+

FREE Premium DPD Next Business Day (Cut off: 2pm Mon-Fri): Orders £250+

*All time-specific deliveries are usually delivered within advertised timeframes, but carriers do not 100% guarantee

N.B. For 18+ orders that include bladed products or alcohol, a £2 surcharge is added to normal shipping costs, to cover the legally required Age Verification service (as detailed above). All such orders will be shipped via Royal Mail.

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.