its light soft stretchy breathable and warm as well i tested it by wrapping my cell in it (only one layer ) n it did not ring , took it out called again n it rang as suspected, as well i wrapped my tablet (which only works threw wiifi) in it (one layer) and called myself from another phone on fb messenger n again it did not ring n i was only like 30 ft from the modem also not to mention when i slept wrapped in it along with my other garment which is a silver lined hood i had extremely lucid dreams all night sense i got it , one of which last night nearly turned into an out of body experience (i get those when most of the variables involved are right) and ill tell you what i had at least 6 reasons i knew of why i should not have one this morning yet still i was so close, tho ill add its hard to wrap up in properly when you fold it in half n lay in the middle i think ill definitely buy a second to cover the mattress with so ill have allot more ease of movement without messing up the 360 degree's of coverage you really need to block these energies (only a gap of 7 and a half cm's will let 5 g bands width in) but yes so not only do i suggest it i'm buying another asap.