Is there a thermal fleece like /polar tech like fabric on the inside of the vest? I believe the pinnacle vest has this type of inner.
THOMAS M No thermal fleece inside it. It is very comfortable to wear under a wetsuit. I use mine for cave diving and it works superb. The HAVS system really doesn't function well from a horizontal position so be sure to add a few small holes on the back of the head(Below the mask strap) to allow air to escape or it will be rather annoying(Like all hoods).
JAMES F There is no liner on this hooded vest. It is smooth neoprene like you get on many wetsuits. However, it is very comfortable and fits like a glove.
LYNN S No. The vest does not have an inner lining. However, the face seal is very effective at limiting water flow into the hood and vest.
Miyuki S This does not have a thermal fleece like /polar tech like fabric on the inside. Pinnacle has hooded vests lined with Merino for extra warmth. The Merino lining is also soft and makes the vests more comfortable.