Quite impressed with the product received, you can't go wrong for £1.99 GBP and shipping, at the time of purchase. The pouch is made out a thick see-trough PVC material, which has a similar feel to the plastic from a swimming aid.
If you are not too keen on the drawstring strap, it can easly be removed by pushing a small screwdriver in the the end clip and releasing the two string ends. Then it is just a matter of pulling out the string on one side and out of the back of the pouch. I'm sure it is possible to re-insert the drawstring into the back of the pouch with a wooden skewer if necessary or placing it simply into the top fold.
As I haven't seen it mentioned before, the outer dimensions of the pouch are about 230mm x 175mm. The Kindle Keyboard just fits underneath the black part of the top (Amazon branding and screen is fully visible), with plenty of room to either side. But there is still enough room to move the Kindle slightly upwards, in order to give enough room to "grab" the switch slightly as to switch it on. I guess you will be able to fit items with thickness of a Kindle and size 160mm x 200mm(with rounded edges) into this pouch.
The product description mentions two seals, but there are actually 3 seals, similar to re-sealable freezer bags. Once all 3 seals have been shut, you roll the top together and keep it in place under the back part with the two plastic pushfit fasteners.TRIXES Blue Amazon Kindle Holiday Waterproof Case Cover Protective Bag Pouch
Positive feedback on the supplier (Digiflex) as well, very fast despatch.