25-30l travel backpack Topo Designs Global 30L Bag Black With the Peak Design Travel Backpack 30L Ocean Travelpro Altitude Medium Expandable Travel

The route gains nearly 2,000 feet of elevation through the alpine meadows, forests, and scree fields of Pine Creek Canyon before arriving at an Instagram-worthy alpine lake (though be sure to read up on Aspens Tag Responsibly campaign before posting a photo, which encourages travelers not to geotag lesser-visited areas to prevent overtourism)

The Atmos hip belt is partially covered in the same spacer mesh as the back panel, which may help to reduce sweat

Luckily, most of these companies include detailed videos and descriptions on their websites and have reasonable return policies.

I haven't' had time to investigate further