These run a little roomy and feel sublime. Every adult guy ought to have a classy pair of pajamas and this is that pair. I never like sleeping in long pants or sleeves, but this material is stretchy and breathes well. Classic style for classic good looks. Bonus points for the matching robe sold separately.Bought these for my husband and he loves them. He normally complains about being hot when he sleeps, these pajamas kept him cool. I have yet to hear something negative about the pajamas.My son gave me this set for Christmas. Perfect for me! Insulating yet b6reatable plus stretchy fabric. Sharp looking contrast piping on top.