Rainy's Fly Tying Cross-Link Sheet Foam is a very durable and condensed closed-cell foam that works great for foam patterns.
How to Tie: The Project Hopper v2 - Flylords Mag
FLY TYING - PB FlyFishing
Rainy's Float Foam - Black - BWCflies Australia
Air-Lock Foam Indicator
Rainy's Premium Fly Foam
RAINY'S CROSS-LINK SHEET FOAM - Closed-cell floating foam with a smooth silky-finish for making ants, beetles, inch-worms, hoppers or the hot new
RAINY'S Cross Link Sheet Foam
2mm Fly Tying Foam
Tying Sheet Foam – Fly Fish Food
A durable and condensed closed cell foam--A durable and condensed closed cell foam, 3.5 x 6, 1 sht/pkg
Rainy's Cross Link Sheet Foam
Rainy's Fly Tying Premium Craft Fur (5 X 5 Square)