Thank you for answers.
Tested my touch (PW not yet arrived) in zipper bag but it acts very ... Think, that bag are too soft.
Ordered
THIN FOLIO SMART PU LEATHER CASE COVER FOR AMAZON KINDLE PAPERWHITE 3G/WiFi from ebay and with waterproof cover (think, that I can use it for somthing other thing, if cant normally operate kindle through it).