Listed officially as a hut site, it turns out to be far too cramped to have sheltered anyone for any length of time. The entrance alone, a mere half a metre high and half a metre wide, would require a person to crawl flat to get inside, and the interior offers no meaningful improvement, rising to just one metre at its highest point. Whatever purpose this corbelled chamber once served, it was not as a dwelling.

The structure is circular, roughly three metres across at its widest, and built from large slabs and boulders of limestone, corbelled into a low dome and roofed with hefty limestone flags. Corbelling is a technique in which stones are laid in overlapping courses, each projecting slightly inward over the one below, until the gap at the top is small enough to be covered without the need for a keystone or mortar. It is a method with deep roots in Irish prehistoric and early medieval construction. At Shrone More, peat and heather have since crept across part of the roof, so that the structure has gradually become absorbed into the upland landscape around it. The north-facing entrance suggests a deliberate orientation, though what that might have signified is unknown. F. Coyne, writing in a 2006 upland archaeological study of Mount Brandon and the Paps, noted explicitly that the access and interior dimensions rule out its use as a habitation, leaving the question of its original function genuinely open.