backpacker traveler fastening sternum strap on backpack and preparing for trekking at summertime sunny day

active activity adjusting adventure athlete backpack backpacker belt day discovery explorer fasten fastening fitness freedom happy health healthy hike hiker hiking human jogging landscape laughing leisure lifestyle man mountain mountains nature outdoor people person preparing run runner smiling sport sportswear sternum strap summer summertime sunglasses sunny tourism tourist trail travel traveler trek trekking walking young