Iceland's Sky Lagoon Is a Wellness Haven — Here's What to Pack For It

Koolaburra by UGG Koola Ultra Mini Platform Boot ($95)

Shoes are not permitted in Sky Lagoon's locker room or shower areas, so you can anticipate spending most of your treatment barefoot. I recommend opting for an easy slip-on shoe like this cozy UGG boot that you can quickly take on and off as needed, especially when you're exiting the spa area where the traffic is typically heaviest.