I must have lucked out (after reading the bad reviews), because the quality of my Thermasilk is fine. It ran a bit large--the idea is it should be tight and go under other layers (though sometimes I put a small tank top under it). It's quite see-through and breeze-through, so its insulating power doesn't work unless something is worn over it. It's great for travel, weighs almost nothing and packs small. It kept me warm without bulkiness on a week long walking tour in February. If it got too hot it was easy to take off and store in a purse (especially with the small tank underneath it in case I had to remove it in public).