Columbia Sportswear Gathering Storm Omni-Heat® OutDry® Mittens - Waterproof, Insulated (For Men)

I ordered these mitts in anticipation of next winter's hikes. It's already too warm now to really put them to the Cold Test. I ordered XL even though I have somewhat skinny fingers so there'd be room for wool liner gloves, and maybe poly liner gloves beneath them. But there may be a problem: When I put them on my bare hands, I feel some constriction at the base of both thumbs. It's cut or sewn just a little tight there. That could mean circulation problems-->cold--->numbness next winter. Product description says closeouts rather than seconds, but STP has to rely on the Mfg's word to some extent. I need to contact STP to ask about this and whether this is a quirk with this particular pair, or if they're pretty much all made this way. At the same time, I also bought the gloves with the identical model name except for the last word being "gloves" rather than "mittens". The glove thumbs had no feeling of constriction.