Urethane and plastic maybe?

the THS is around 37', local house bowlers complained that the longer 39-40 ft pattern was too hard.

Simply amazing.....

unless you can loft the ball to the midlanes consistently, maybe look for lower end equipment that won't read the front parts as much.

I am returning to second shift leagues this winter. the THS is around 37', local house bowlers complained that the longer 39-40 ft pattern was too hard. These were the higher handicap bowlers.

So, when I used to bowl this late league, it can get really toasty - following a 5 man team league. but most nights, the heads were dry, mids still had some, and balls hook in the back. I don't follow the current line ups these days and I was wondering what balls should I look into?

I wouldn't buy anything new until you learn exactly how dry it is. Unless you've already bowled on the same pattern, in the 2nd shift, in this house, you never really know how your current mildest balls will react. They might just need a slight surface adjustment to work fine.

You also don't know if the oil will be kicked outside and you can play a straighter shot (Blue Hammer or a Rebel Tank) or you will have to move deeper and use a ball that clears dryish heads and has a strongish backend (Graffiti Tag or a Ride).

I would try a high RG ball...

That's so wrong. 

I would try a high RG ball...

terrible lol

"........she got much back"

Pics or it most certainly DID NOT HAPPEN!