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The cheepo foam does indeed dry out & break up. The GM/Noch one should be better though.
If the underlay is not exposed to light by covering with "snow" then it should last longer.
You could always use FLM Profi track, more expensive but you'll never have any problems with it !
If the underlay is not exposed to light by covering with "snow" then it should last longer.
You could always use FLM Profi track, more expensive but you'll never have any problems with it !