This is simply a Hauberk of doubled mail or kings mail (8 in 2 weave or 6 in 1 weave). It is considerably heavier but also more effective than ordinary 4 in 1 mail. Normally worn only by cavalry or during a siege, this is not easy armor to run around in let alone march in. But it definitely could save your life.

Name	DR Pierce	DR Cut	DR Slash	Weight	Bypass	Hardness	HP
Doubled mail hauberk	10	20	30	30	6.0	8	7