Heatwave ThermalwearHeatwave® Pack of 2 Men's Thermal Long Sleeve Top, Warm Underwear Baselayer, S M L XL XXL Thermals

isbit breathable at all or does it make you sweat??

Are these tops nice and long? Need something that will tuck right down into trousers and not come untucked when bending down, etc! Thanks.

I have Heat Holders usually are they as good ?

Are these tops suitable for wearing in bed?