Ptex, P-tex base or UHMW PE base for skis and snowboard.
IS CB 7115X
before cutting, lay the base on a flat table for about 48h the base will start to relax. The heating tunnel is just a fast way to bring out the tension.
Storage: Room temperature with low temperature fluctuations. Humidity should not be too high. You can store it on the roll. If you recognize some wraping you can also try to wind it in other direction for storage.
Gliding ability is related to snow condition, but generally on top level, see spec below.