This makes the coat rather heavy and bulky.
RING MAIL is leather armor sewn with closely set iron rings.

BULK: fairly
WEIGHT: 25#
BASE MOVEMENT: 9"
COST: 30 g.p.

PP: -40
OL: -15
FRT: -15
MS: -40
HS: -30 (requires cloak)
HN: -20
CW: -40 (WSG: -20, a character in anything heavier than chain cannot climb any severe slope or cliff
[DEX bonuses for thief skills do not apply when wearing chain] <cite>

TW: -40%
PV: -4'
HJ: -4'
BJS: -3'
BJR: -5'
TA: -20%
TE: -30%
TF: -10'

PT, <0: +0
PT, 0-30: +5
PT, 31-75: +10
PT, 76+: +15

PUMMEL DAMAGE:
GRAPPLE 'AC':
GRAPPLE DAMAGE:

ADQ: Studded leather has the 
same AC as ring mail; both are "fairly 
bulky" (DMG page 27), and movement 
is the same (9") with either one. Why, then, 
is ring mail twice as expensive as studded 
leather?
ADA: It's more expensive because it's 
harder to make. Studded leather should also 
be much harder to enchant, and have a 
lower limit of enchantment, than all-Metal 
(i.e. ring) armor. In general, armor involving 
combinations of materials (studded or
scale) is harder to enchant than armor of a 
single material (leather, chain, or plate); 
note that the underpadding and straps are 
not considered in this "rule of thumb". 
Leather or ring mail could thus bear a 
maximum of +5 enchantment, while 
studded leather should have a maximum of +2 
or +3 (DM's option). 
(Polyhedron #24)