Talk:Mammoth/@comment-27157581-20151113202235/@comment-27694485-20160811110223

they dont suffocate in reinforced glass, and no other mob either, because it's transparent, and you can't suffocate in transparent blocks (except for monster spawners).

list of transparent blocks (the ones without suffocation):

-glass,colored glass, glass panes and colored glass panes.

-leaves

-all non-solid blocks (but are useless as they dont block movement)

-doors, trapdoors, gates

-pistons and piston arms.

-beacons

-fences and walls

-slabs and stairs

-reinforced glass and ancient glass

-ice (not packed)

-snow layers stacked up less than 8 times (less than a full block)

-TNT

-chests, brewing stands, enchantment tables

-beds

-water (altough you would need water breathing)

-lava (altough you would need fire resistance)

-glowstone

-every other transparent block except monster spawners and end portal frames.