The Contour sleeves are vinyl. They used make a urethane one and they came in light blue.
I used them for about 20 years until the PBA decided that if you got caught with them in a ball it was a fine/possilbe DQ. Until the early 90's, they were pretty much the only guys on the block in the grip game.
The vinyl ovals are easy to install and trim down. If you find they are too tacky, you can take a small piece of 320-600 grit sandpaper, wet it, and smooth them out quite a bit.
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Mike Craig-Columbus, OH