"What would Robert Redford do?"
It's a question worth asking yourself in many a situation. Although given Bob's one of the coolest men to ever don a pair of sunglasses, perhaps no more so than when in the market for a nice new pair of lenses.
And as the Hollywood icon's a big fan of two-tier sunglasses, we're sure he'd approve of these 20 double bridged beauties - which, ahead of the looming holiday season, could prove a worthy investment.

Dries Van Noten - Metal And Acetate Sunglasses
£230

Topman - Brown Round Aviators
£15

Spitfire - Lennon Flip Up
£25

Cutler and Gross - Aviator-Style Metal Mirrored Sunglasses
£310

Ray-Ban - Black Classic
£125

Ted Baker - Blakie
£75

ASOS - Reclaimed Vintage Square Sunglasses
£20.00

Garrett Leight California - Harding D-Frame Acetate Sunglasses
£260

Versace - Light Gold Pilot Sunglasses
£182

J. Crew – Jack Aviators
£98

Dolce & Gabbana - Round Glasses
£120

Taylor Morris - Brown, Tawny & Amber Stripe Acetate
£170

Mango - Men's Classic
£25

Spitfire - Sonic Silver Blue Unisex
£24

River Island - Grey Metal Frame Round Sunglasses
£14

ASOS - Gold Aviators With Flat Lens
£14

French Connection - Temple Detail Square
£49

Emporio Armani - Round Sunglasses
£145

H&M - black two-tier sunglasses
£7.99

Taylor Morris - Rollright
£170