Check out these pictures from hothardhat, who is a gear fanatic:

I had the pleasure of meeting hothardhat in person recently, when we both visited Bind of Men In Chains and Mark of Serious Male Bondage. Hothardhat is into heavy, full-rubber encasement, neoprene wetsuits, drysuits, encapsulating hazmat and commercial dive gear, among many other kinks.

You can find hothardhat on FetLife, where he has much more information and pictures!