Look for a smooth, consistent surface without blemishes or synthetic coatings
A smaller ice-breaker, the Sampo , built by the same firm for Finland, has gone through sheet ice 12 inches thick at a speed of 8 knots, and frequently through drift ice 10 or 12 feet thick
Mentioning backing, this is a great use for monofilament line
Its made of rugged 210D nylon double diamond ripstop and features a lockable zipper for easy-opening and security
There should be such aspects to look at when purchasing bags such as durability, size, which material the bag is made of, and additional facilities like pockets for a laptop, water resistance, and zippers that will prevent thieves from getting into it