Low-priced stock that sells at less than $1.00 per share. Often highly-speculative and volatile, such as start-up mining companies. While, in general, penny stock are considered high-risk securities, some penny stock mature into less-speculative investments. All penny stock are traded over-the-counter.
In its natural form, cork is also a very good fire retardant, although cork dust is actually extremely flammable (because here the cell structure has been broken down). Impermeable: Cork has a magic chemical in its cell membrane that makes it completely impermeable to liquids and gases.
The cork footbed will absorb water in wet conditions, which results in the cork drying out. This will make the footbed of the sandal vulnerable to chipping and cracking over time, Porter says. She stated the cork will never be fully waterproof, but there are ways to help protect against the damage. Take a look at a handful of ways to make your Birkenstocks almost waterproof.