Conina on 24 October 2015
If he wants a Samsung, he can get the S6 Active: http://www.gsmarena.com/samsung_galaxy_s6_active-7114.php
It's IP68 certified (dust and water resistant up to 1.5 meter and 30 minutes) and MIL-STD-810G certified (salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant) and has a much better battery life than the Xperia Z5 (according to GSMArena): http://www.gsmarena.com/battery-test.php3
